Way to go, @burnout426! You nailed it! I restored the defaults for Opera, logged back in with my Opera Account, and re-enabled synchronization (leaving the "Settings" option off as in the picture below) and the "Move to" keeps showing all Workspaces!
9d20c14f-9fe7-4ca7-b0a1-f52d841312e8-image.png
Anyway, I enjoy settings synchronization. It is not urgent for me, but if there is any Opera developer watching this forum, I would like to ask please, fix this incompatibility between Workspaces and Settings synchronization.
Thank you all! You were awesome! 😉