Thank you for your help. Yes, I meant "migrated", sorry for the confusion.
Importing all descriptors gave me some errors, I don't know why.
Meanwhile I asked 'Copilot' and it informed me that the command
importdescriptors
also works for addresses
importdescriptors '[{ "desc": "addr(ADDRESS)#HASH, "timestamp": UNIXTIME }]'
I can even combine it to search for all addresses from the legacy wallet at once.
This did the job, problem solved
