How to withdraw an application from Google Play ASO sanctions?

Question

Marketing

The application has been in the top 3 for all the necessary HF keys for a long time. After the update of the meta (title, short, long) in September, there is an uncontrollable fall in the ranking by several times. I assume that these are sanctions for keystaffing. Motive doesn't work.
Rating 4.8, 1m+ users.

1. How to check for sanctions?
2. If these are not sanctions, then what else can be?
3. How to understand 5 specific keys?