iPhone 13 Touchscreen (bottom) task bar in not responsive or erratic

JLineberry wrote:

Unresponsive lower right hand rarely works

follow through—

have you restarted the iPhone ie power off/on,

Restart your iPhone - Apple Support

Reset/ or a Force Restart,

Force restart iPhone - Apple Support

restore from backup, restore as new device.

Restore your iPhone, iPad, or iPod to factory settings - Apple Support

put your iPhone in diagnostics mode - identify potential hardware and software issues

How to put your iPhone in diagnostics mode - Apple Support

iPhone Repair and Service - Apple Support

iPhone Repair & Service - Apple Support