iPhone issues

Watch the GIF below

Settings > Accessibility >Switch Control > Switch Control [Disable]

if it was

me then I would

try

restarting the ios device Force

restart iPhone - Apple Support

and

check if it resolved it if it did not

then

I would try Restore

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

-

Apple Support if that did not resolve it then I would

contact

apple about repair Contact

- Official Apple Support