Since you ejected and not using any expo package, why not just create a new react native cli project and transfer the files and configure the things you've already installed. I think you should start from there.
Back end is crazy...buy it has gotten easier over time...using an ORM like drizzle is will greatly improve ur back end skillOk... I guess you'll need to narrow down the error to the package that's causing it.
The layman meaning of the error is that you're trying to call a native function into react native that's null but the function requires that it's not null.
The new project was pure react native
I only copy some filesThe packages you installed, you configured them properly