Could still be the battery.
If you don’t have one to swap in to check, can always take it out and to an auto store/shop and test it, or use something like this:
Amazon.com Page Not Found
May be showing enough volts with a voltmeter, but not enough CA to turn it over.
My sons battery recently died suddenly.
Drove it to a relatives house, got there and it wouldn’t start back up, even after charging and attempting to jump start.
But all the electronics/accessories worked fined, just wouldn’t turn over.
Had the battery tested at Pep Boys, tested bad.
New battery in and it fired right up.
