Maybe I am not clear but Disk Utility is where you format the drive. I have 4 external SSD drives hooked up to my. 2018 MM. One is for Time Machine, One is for CCC, both formatted APSF encrypted. A Samsung T5 formatted Mac OS Extended (Journaled) and the 4th is Crucial X8 formatted APFS encrypted.
I think I was not having success with speed using APFS format on the T5 and that is why I went Extended Journaled?