my iphone 13 is stuck in zoom mode and tapping twice with three fingers doesn

Try a Forced Restart on the phone. Follow the instructions very carefully, as this is a bit tricky. You may need to repeat this several times.

Force restart iPhone - Apple Support

There are only 2 possible results when you perform a Forced Restart:

1) The phone returns to normal operation

2) There is a hardware problem with the phone that will need attention at the Apple Store (make an appointment) or at an authorized Apple Service shop

You can find a list of authorized service shops in your area using this link:

Find Locations

Hello dmo818, try to restart your iPhone and see if it works, if you can’t do so, try force restarting, click the link for more info. If your iPhone won't turn on or is frozen - Apple Support. Please let me know if it works.

-Xxmaclhrjs