My iPhone 13 won’t turn on at all even after I tried the hard reset what can I do?
what can I do to get the phone back on without losing data?
iPhone 13
There is really no way to tell what the issue may be with your iPhone. At this point, I would suggest that you contact Apple Support for further assistance with this matter. To do so, simply select the "Get Support" link in the upper right-hand side of this forum's web page.
Ref: If your iPhone won't turn on or is frozen - Apple Support