How can I encrypt my mobile phone display?

em
1

I have the following problem

My Samsung a71 was encrypted with fingerprint and pin.

The other day I threw out the SIM card and when I put it back in, I entered the wrong password 3 times.

Then I found the PUK with a laptop, entered it and everything works again.

Only now the display lock is ineffective. Fingerprint and password are no longer asked. Always swipe to unlock. What have I changed there? I can't figure out how to encrypt the display again.

Oh yes, there's always an open lock symbol at the top

ke

Settings> Screen lock> Screen lock type