Overwatch 2 hardware bans are the case where the computer is refused after the Battle.net login has been replaced. The client never reaches a normal queue because the HWID matches a stored ban.
The anti-cheat collects device identifiers from the PC at launch. Those are the values a hardware ban is checked against.
The Overwatch 2 spoofer presents a different hardware ID so the banned profile is not what the game sees.