How can I know which Android phones support multiple users profiles?

It's very rare, even impossible to find out whether multiple users feature is included on a specific model.
From my experience, only a handful of manufacturers keep this feature turned on on their Android devices. Mostly not very famous Chinese brands like: Wieppo, Ulefone, Oukitel, and Oppo. Why do other big manufacturers turn off this great feature of Android? It is stupid.

The only fast and easy way to know whether a device is capable of running multiple users is to just see a working model in a shop and check if you can spot an avatar in the right corner or in Settings.

The bad thing is only with this current pandemic is that visiting an electronics or phone shop can be quite a hassle/dangerous.