How to organize oc_activity database

I’m using MariaDB, but only oc_activity is quite bloated.
I set activity_expire_days to 90 newly. This will automatically delete old items in 90 days.

In the current DB that has become bloated, can I only delete it manually? Is there a way to delete all data at once?

MariaDB 10.2.29, Nextcloud 17.0.1

You can check on the admin-page if the cronjobs are running fine. They should trigger all the clean-up procedures. Also check if you have stuff older than 90 days in your database.