Although it is not the solution I prefer: I have imported my Keepass database that was first exported to Bitwarden from Bitwarden to Enpass. That worked.
Enpass searches in all items when one chooses to do so. Wished that Enpass also searchesin Title, Fields and passwords all together by default.
I wonder why one has to choose from one of the three which could mean that one has to search three times.