Run this command to make printer available to print from Opera.
sudo snap connect opera:cups-control :cups-control

I've been using Opera as a snap package with Linux Mint for several versions and it seems to work well.

@leocg sure do! Quite annoying

I'm on Linux Mint 21 (although it started with LM 20). Quite annoying to have to restart Opera each time. Using the latest version of Opera as a SNAP

@prsy I have the same problem. Its been going on for a month or two on Linux Mint

Run this command to make printer available to print from Opera.
sudo snap connect opera:cups-control :cups-control