I had an Ubuntu 18.04 with mysql 5.7. I upgraded it to Ubuntu 20.04 with mysql 8.x. But this 8.x not was compatible with my Drupal 7 and I tried to downgrade. After this I tried with a 5.7 docker image and this show the database but not the tables inside.
In the /var/lib/mydatabes directory I see a lot of .idb files, but nothing else. Is it possible to recover the database tables? And how?