[SoftTalker]

All my "unknown sender" texts get filtered to a separate view, and do not create a notification. If I'm expecting a text from an unknown number (such as a 2FA code) I'll just open the "Unknown Senders" view. The rest of the unknown messages are ignored.

[pasc1878]

Unfortunately on iPhone you can't set some messages to unknown sender and some spam calls seem to be in known senders

[criddell]

Do you have “filter unknown senders” turned on?

[pasc1878]

Yes and that is how I know it does not work. There are senders I cannot get into known.