How to change font size and unlock iPhone 15 Pro Max when settings are inaccessible?

Iphone 15 pro max -

The font size is set to max by accident.

I cannot unlock the phone

I cannot change the settings

Siri cannot unlock the phone

I basically have a very expensive paper weight.

What now?

[Re-Titled by Moderator]

Original Title: IPHONE 15 PRO MAX - Cannot unlock phone. Cannot change the font size. Siri is useless