Apps on screen permissions

Can you move the screen by using three fingers? If you can then you have accessibility zoom on. Try double tap with three fingers.

Or if not, Check Settings, Display & Brightness and set to Standard display.

OK I have installed Google Search app with expected results on ios15.1

I suggest you try to normalise settings relating to Display, particularly accessibility settings til you find the culprit. Also check for the obvious wreckers such as security and VPN apps and remove them.

👍 seems to be one of those inexplicable glitches.

Backup and restore probably would have done it absence of update.

That looks like Chrome browser?

If you have Safari open does the same thing happen?

Can you rotate the screen for access?

You say it freezes - is that even if you tap OK?