Convert pop3 to imap

I need to migrate a domain with 5 accounts from a server
icewarp on premise Deep Castle version 2 update 2 build 12 in cloud

The problem is that the accounts are old and configured in pop3
The customer has always used them only with webmail

Now if I try to convert accounts from pop3 to imap / pop3 it loses all message statuses (read / unread and replied not replied)

There is a solution to convert without loss