Here are some more potential additions to the list, including almost all new proposals from this forum, plus some more that I've come up with.
I'm a little hesitant about the Venezuela birds... Mainly because there's so many of them😅, but can someone shed more information about how dangerous it would be to travel to Venezuela at the moment? Imagine someone who only needs to clear up a handful of Venezuelan endemics they missed on previous trips.
The list potential additions include a number of birds that are likely extinct or extinct in the wild, but not marked as extinct in the IOC 13.1 spreadsheet, therefore they must be included here.
When I find a little more time, I will check all provisional designations, in the meantime I'd be happy to receive any feedback if you spot any errors.
New:
486 Eaton's Pintail (Anas eatoni); B
751 Alagoas Curassow (Mitu mitu); A, Extinct in the wild
757 Sira Curassow (Pauxi koepckeae); B
1715 Cayenne Nightjar (Setopagis maculosa); A
2757 Turquoise-throated Puffleg (Eriocnemis godini); A
4473 Mindoro Bleeding-heart (Gallicolumba platenae); A
4482 Polynesian Ground Dove (Pampusana erythroptera); B
4716 Rapa Fruit-Dove (Ptilinopus huttoni); B
4723 Henderson Fruit Dove (Ptilinopus insularis); B
4773 Negros Fruit-Dove (Ptilinopus arcanus); A
4926 White-winged Flufftail (Sarothrura ayresi); A
5167 Makira Woodhen (Gallinula silvestris); A
5285 Henderson Crake (Zapornia atra); B
5535 Buff-breasted Buttonquail (Turnix olivii); A
5579 Black-faced Sheathbill (Chionis minor); C
5951 Snares Snipe (Coenocorypha huegeli); C
6306 Kerguelen Tern (Sterna virgata); B
6535 Amsterdam Albatross (Diomedea amsterdamensis); B
6611 MacGillivray's Prion (Pachyptila macgillivrayi); B
6645 Henderson Petrel (Pterodroma atrata); B
6664 Mascarene Petrel (Pseudobulweria aterrima); B
6670 Fiji Petrel (Pseudobulweria macgillivrayi); B
6699 Bryan's Shearwater (Puffinus bryani); B
6703 Rapa Shearwater (Puffinus myrtae); B
6920 Kerguelen Shag (Leucocarbo verrucosus); B
6921 Heard Island Shag (Leucocarbo nivalis); B
7304 Cuban Kite (Chondrohierax wilsonii); A, Likely extinct
8270 Pernambuco Pygmy Owl (Glaucidium mooreorum); A
8345 Annobon Scops Owl (Otus feae); A
8375 Siau Scops Owl (Otus siaoensis); A
9149 Moustached Kingfisher (Actenoides bougainvillei); B
9362 Guam Kingfisher (Todiramphus cinnamominus); A, Extinct in the wild
9389 Niau Kingfisher (Todiramphus gertrudae); B
9457 Sangihe Dwarf Kingfisher (Ceyx sangirensis); A
9834 Sira Barbet (Capito fitzpatricki); B
10987 Ivory-billed Woodpecker (Campephilus principalis); A, Likely extinct
10990 Imperial Woodpecker (Campephilus imperialis); A, Likely extinct
11799 Spix's Macaw (Cyanopsitta spixii); A, Extinct in the wild
11950 Blue-winged Racket-tail (Prioniturus verticalis); D
12189 Blue-fronted Lorikeet (Charmosynopsis toxopei); A
12211 Red-throated Lorikeet (Vini amabilis); A
12216 Stephen's Lorikeet (Vini stepheni); A
13359 Masafuera Rayadito (Aphrastura masafuerae); B
14518 Tachira Antpitta (Grallaria chthonia); B
16912 Gilliard's Honeyeater (Vosea whitemanensis); A
19721 Annobon Paradise Flycatcher (Terpsiphone smithii); A
19818 Santa Cruz Shrikebill (Clytorhynchus sanctaecrucis); A
20221 Javan Green Magpie (Cissa thalassina); A
20360 Hawaiian Crow (Corvus hawaiiensis); A, Extinct in the wild
22133 White-eyed River Martin (Pseudochelidon sirintarae); A, Likely extinct
22986 Nauru Reed Warbler (Acrocephalus rehsei); B
22987 Caroline Reed Warbler (Acrocephalus syrinx); B
22988 Bokikokiko (Acrocephalus aequinoctialis); B
22997 Moorea Reed Warbler + (Acrocephalus longirostris); Reject (Extinct)
23009 Rimatara Reed Warbler (Acrocephalus rimitarae); B
23013 Cook Reed Warbler (Acrocephalus kerearako); B
23017 Henderson Island Reed Warbler (Acrocephalus taiti); B
23018 Pitcairn Reed Warbler (Acrocephalus vaughani); B
23026 Speckled Reed Warbler (Acrocephalus sorghophilus); A
24381 Annobon White-eye (Zosterops griseovirescens); A
24426 Sangihe White-eye (Zosterops nehrkorni); A
24499 Vanikoro White-eye (Zosterops gibbsi); A
26363 Cozumel Thrasher (Toxostoma guttatum); A, Likely extinct
26484 Pohnpei Starling (Aplonis pelzelni); A
26583 Javan Pied Myna (Gracupica jalla); A, Likely extinct
26791 Olomao (Myadestes lanaiensis); A, Likely extinct
27578 Rück's Blue Flycatcher (Cyornis ruckii); A
27580 Rufous-breasted Blue Flycatcher (Cyornis camarinensis); A
27892 Rufous-headed Robin (Larvivora ruficeps); A
28476 Cebu Flowerpecker (Dicaeum quadricolor); A
29198 Zarudny's Sparrow (Passer zarudnyi); D
30504 Kauai Nukupuu (Hemignathus hanapepe); A, Likely extinct
30505 Maui Nukupuu (Hemignathus affinis); A, Likely extinct
32102 Bachman's Warbler (Vermivora bachmanii); A, Likely extinct
32133 Semper's Warbler (Leucopeza semperi); A, Likely extinct
33443 Wilkins's Finch (Nesospiza wilkinsi); C
33444 Nightingale Island Finch (Nesospiza questi); C