Absolutely, just didn't want to seem as advertising etc.
It is called Boxer Email, it is primary for corporate email accounts on personal devices but it works for personal use too.
It is not very customisable but it has some basic features and what I kind of trust is the brand name and the secure tech behind it as well as its professional look and feel (no offense to individual coders!
I tried the FairEmail and it was extremely slow with Ymail.
Some others like Blue Email, K-9 and others were okish but the main problem was display issues. Some fonts did not display properly or the dark theme didn't work properly etc.
If you set it up with Ymail, you probably need to generate an app-specific pass to be able to login.