Not being indexed is a side effect of quarantine.
Notifying Itch support will not do much. They are swamped and since the game is quarantined, it already is on a list for investigation.
You actually already tell people that the game will register on an antivirus scan on the download page - unless that is new. If you do those fancy pck packing or whatever it is called from Godot, yeah, that will get flagged by scanners a lot.