Hi Hex, it is be it slow. We do this on the side and where/are planning to release with J4 and prepare for that. But J4 release date has been moving and code has kept changing.... we are closely linked to Joomla core so that's annoying and much work.
Currently we are testing a refactored version of F2C which will make the migration to J4 easier.
Please read the F2C documentation before asking questions! Thank you if you've done so