That's not true
- We have no evidence about either and both are non-falsifiable
- Living in a simulation is one idea. Each individual religion is a whole bunch of assumptions rolled into one system.
Therefore “we live in a simulation” is just as likely as “there's some higher power”, while “the Matrix is a documentary, everything will happen exactly like in the movie” is as likely as “the Christian god is real, just as described in the bible”.