Hello.
I'm searching developer center docs.
But I didn't find hardware specification when submitting a application to app store. Can I know the minimum & recommended hardware specification?
The developer docs only say to build using the latest API.
Or, is the hardware specification not important? Do I just need to build with the latest API?
Welcome to the forum.
There is no hardware specification to submit to AppStore.
Simply note that you must build with Xcode, hence you need a Mac. and you have to use a recent Xcode version, which means your Mac must not be to old (usually less than 10 years) to run it.
To run Xcode, 16 GB RAM and 512 GB of disk are usually needed at least.