Could (a) god(s) exist? Possibly, it’s hard to rule out the supernatural in natural terms since it’s SUPERnatural
Could the universe be a simulation? Possible too, but also on of those things that’s almost impossible to prove.
At the same time, it could be that your e a Boltzmann brain, and that literally nothing existed before and that your brain just kinda formed together spontaneously with all your memories.
All those are possible options that are over 99% likely to be false, but their cooouuullldd be true.
Point is not to rearrange your life on the off changlce that one of those are true. Especially religion, since religions tend to be “believe our particular god(s) or you go to hell for eternity” followed closely by “if you don’t believe our particular god(s) we will help you go to hell right now”. Nearly all human conflicts in Earth’s history were either based on religion or used religion as a tool to whip up the masses to go kill the others.
There are also hundreds of Gods and over 3000 different religious figures out there and they’re all pretty much exclusive or, they all claim to be the right one and the rest is wrong. Bold claim to make when it’s all based off goat herders texts that were first abused for a completely different god (hello, Christianity!) and constantly conflicts with each other.
Simulation theory and Boltzman brain ideas are fun to entertain and talk and think about, but they’ve never been used to control who can love and have sex with who, they’ve never been a used whereas religion just IS abuse and control in every way possible.