We very recently had this same situation. The PDP was removed but clicking the "Fix" button lead to the Product Policy Compliance page which stated there were no violations.

I opened a case with Seller Support (which I've rarely done in 12 years) and received a reply that stated:

"The reason for your listing to be inactive is either that it is incomplete [which was not true] or that it has not had any active offers within the last 30 days [which also was not true]. In order to activate this listing, relist the product by creating a new product listing on Amazon."

The agent then advised me to relist the item.

Now, like most other sellers I debated whether or not to actually follow this recommendation, knowing that many times Seller Support can give incorrect answers. I eventually decided to follow that advice, the listing is Active and we've received no further communication or violation (fingers crossed).

Whether or not you want to follow that recommendation is up to you and I'm neither advising you for or against doing so. I'm merely relaying my experience.

What I would suggest at this point is for you to open a case with Seller Support, if you haven't already, to see what they recommend for you.

Edit to add: @Seller_TWo4Qrx2gFY0j's suggestion is a good one. In our case, we didn't have a Performance Notification; just the exclamation point in the triangle next to the Restricted Product Policy Violations link on the AH Dashboard. Is that what you're seeing?