All 3 of them are too old, Ellen Page has also transitioned and is now Elliot Page (also 35).
Ellie's meant to be a child, Bella Ramsey at least still looks like a young teenager.
Especially when it's a multi-season programme, Scanlen, the youngest of your 3 examples, is 24 right now (and also looks nothing like Ellie) and would be playing a 14 year old for this season, and if it follows the plot of the games exactly then a 19 year old in the next one.
Ramsey is 19 now, but looks younger.
I think the biggest criticism of the show in the build up has been her casting, but she's a good actress and I doubt people who've never played the game are going to be as hung up on her not looking like an exact replica of the video game character.