Here's the situation. I have all the database files. They are .frm and .ibd files, so this means the db is in INNODB format. There is only one ibdata1 file, so the individual databases did not have their own ibdata1 file.

The mysql database installation is brand new and is version 8.0.23, but the files were from a mysql 5.6 db. There is no existing mysqldump file of the dbs. The only evidence they ever existed is the files in the directories....