I believe the standard became more strict for this Olympic cycle. They didn't have the same rules about two players being in the top 10 in rankings for your country and the other two being top 50.
That Tokyo team consisted of 4 legit WNBA players that knew their roles. The current standings for 2024 didn't really have that great of options.
This tweet was the best list I could find of what most of the top 50 consist of.
x.com
It seems as though Team USA goal going forward is to encourage more WNBA players to play 3x3 to ensure they are ranked well come Olympics time.