I've forgot to include some more info:

MIUI Global 12.0.8 QJGEUXM
Android 10 QKQ1.200512.002

Tried with both Adblock enabled and disabled. Well I've tried enabling/disabling all options, nothing helps.

On Xiaomi is possible change default browser: Nastavení / Aplikace / Nainstalované aplikace / 3 tečky - Výchozí / Prohlížeč

@amirbay I guess so.

@leocg This is is exactly what I came to the forums to ask. 1Password uses iPhone's Services system. It means even Google Chrome makes it easy to use. But Opera's Touch interface doesn't make that button available. I'd even be for native 1Password support. Otherwise I have to use unsecure ways of inputting passwords. I'm trying to use Opera more regularly, and this is my biggest stumbling block.

Opera built-in VPN works only inside the browser for desktops.

The app called Opera VPN no longer exists and haven't been made by Opera since a while.

@jvmachado Something added to Flow should stay there unless you remove it or reset your data. Maybe one of those has happened?