Okay, let's take this step by step.

This forum is answered by the community, not the staff. I'm clarifying this because you won't find any official answers here, and no one can tell you exactly why your game is in quarantine.

The rules stipulate that if you still request support, you must include your support ticket number (which you haven't done). This way, the moderator might bring that ticket to the staff's attention.

As far as we know, Itch has an algorithm that determines if a game or creator is considered high-risk and their projects should be reviewed by a staff member. The same applies to quarantine. Your project, for some reason (or combination of reasons), has been automatically quarantined, and until it's manually reviewed by a staff member, you won't be released from quarantine.

--How long does it take the staff to resolve this issue?
It varies greatly. In some cases, it takes a few hours, in others weeks, and I've even seen cases that have taken months. There are cases that have never been resolved, and I personally suspect that the staff has decided that the game or creator shouldn't be indexed. The problem is, there's never any communication clarifying this. Personally, if you try contacting support and months go by without your game being indexed, it's best to assume that for some reason you're not eligible for indexing.

-- But the rules say...
I'll tell you what I've seen over the years I've been participating in Itch, and I'll explain, based on my experience, how Itch works. Many others agree that it would be good to rewrite the rules to make Itch's operation clearer.

-- What can I do?
Contact support and be patient. From what I've seen, they're usually willing to help, but unfortunately, the staff is very small and they're often very busy, so they rarely respond beyond what's absolutely necessary.

I’ve let our admins know about your ticket, but as pointed out in the unofficial FAQ pinned at the top of this category, it can easily take a week or more. Please focus on promoting your game instead of worrying about being indexed.

Just the quarantine is kinda scary, we don’t want to worry our players or anything

Disable your downloadable files and remove any links on the description (official links in the info box are fine). Playing the web version does not show the quarantine message.

And if you do not already, maybe crosslink your socials. That means, if your itch points to your patreon, your patreon should point to your itch. There are impostors, and crosslinking your socials makes it easier to have confidence that your account is not fake. Might still be hacked, of course.

Itch does investigate quarantine, and that might take time and might not be a thing that can be sped up. Essentially, they are suspicous that your account might be compromised or that you are intentionally doing bad things.