It’s nice to clarify, but in general, it’s not your fault. Just some settings are not so widely discussed, so you should understand what about it is, at first, only then make a decision.
A detailed user guide how to setup would be a better solution, IMHO. With explanation what every setting means. I remember, when I configured RankMath the very first time, Media Attachments Redirect I learned only after two or three months.
Checked, Yes, sorry, Yoast didn’t have custom, but they have a star symbol *, what I like, CSEO - not, so I thought, the best solution would be a custom option. The best thing - it can be migrated from Yoast
Totally agree. And the language… Maybe you want to see the message in Lithuanian language? I am not.
Now, the serious question. What is the proper method to migrate from RankMath? When deactivate, uninstall, migrate, etc.? Yes, I am going to fire up ClassicSEO on a production website. Or five production websites.
If there are no errors (which, of course, there won’t be), you can deactivate RM. Then check your core settings and individual post settings to make sure everything has transferred across. When satisfied, delete RM.