double command / modifier has been there fore quite a while, however some of these might not work if Secure Input is active. Possibly this is also causing the Teams issue for you? (Some company MDM systems force secure input for some apps - BTT should however show a warning in the menubar icon menu)
Then I don't know what happened in that other thread. The double-⌘ didn't register as triggers (but they do now). Which ought to be unrelated to Teams, since BTT was the active application.
There's no warning in the menu when Teams is active. The Teams problem described in the other thread (multiple presses needed) is still there.