Gmail Migration issues.

Without much help from either Telus or Gmail, I was able to successfully migrate to Gmail on Jan. 20, 2021. I prefer to manage text only messages locally, so I use POP3 on port 995 & SMTP on port 465. My client program was upgraded to support TLS 1.3. A couple of issues however remain unresolved. 1. Messages downloaded via POP3 on one client cannot be downloaded to a second client. Using "recent:" in front of the user address as suggested by Gmail does not authenticate. 2. Only a single message downloads, even if there are several unread messages on the server. I have to reconnect to download each individual message. The server does not seem to respond in a normal manner to the "UIDL" command. J.A. Coutts