Something between hours and never. Because of New Year and Holidays you can expect it to be longer.
And when you made contact to support you did expect something of them. Judging from your wording I got the impression you wanted them to verify your external link and when your game was quarantined you made the connection that it had to be your external link. I do not know how the triggering works, and Itch will not tell. But if I were to make such a trigger, it would include some scoring, and the external link would contribute to it, but would not trigger it alone.
To have a wild guess, maybe you got reported because some people trying out your game had virus alert warnings.
If size is the only reason, try out butler app from itch.