There could be some truth in it because Boyega suddenly left a Netflix show he was supposed to star in.
As for him dismissing being in a Disney+ show....I've lost count of how many actors who have flatly refused to return to a role they starred in only to spectacularly change their minds!
Sean Connery briefly returned to the Bond role in Never Say Never Again, and Daniel Craig is also back playing Bond despite famously announcing he'd quit.
It depends on:
a. the script and premise
b. the money
c. if they have nothing major lined up
As Boyega and Ridley are very good friends I also wouldn't be surprised if Rey also has a tv series...years ago film actors considered tv work beneath them, but these days companies like Amazon, Netflix and Disney+ make an obscene amount of money and the quality of the writing (with a few exceptions) is far better than it used to be. Neither Boyega or Ridley seem to have done or signed on for anything 'big' post TROS; Isaac is currently signed on to play Moon Knight and will be playing Leto Atreides in Dune, so him being in a SW series seems unlikely at least at the moment, but the others...
We'll see.
Tom Hiddleston does stage and film work as well as tv.