Why would there be a police record of misgendering someone?
Losing or keeping one's job is dependent upon the agreed terms of employment.
The UK's "hate speech" laws are routinely being used to rat people out for misgendering (among other things), via a thing called a "non crime hate incident" (NCHI). Again, over 200,000 of these "incidents" have been recorded in the UK.
And employers have access to these police records and can use them to deny employment or take action against employees who have been charged with a NCHI.
As to why there would be a police record? You tell me... cancel culture gone crazy?