Tailor bios that u like, flash it to cards and u should not have problems running them moded on Linux.
LINUX KERNEL 5.5 OR NEWER--
Linux itself may not be ready. Ubuntu 20.04 will be released in a few days with (I believe) kernel 5.4. There are a few less popular Linux distros featuring kernel 5.5 or newer. From what I read, kernel 5.5 or newer has the real support for Navi cards, especially the RX 5600.
Current AMD Linux drivers are tailored for Ubuntu 18.04, and the kernel has poor support for the RX 5600. The RX 5600 with its "upgrade BIOS" is in a developer's limbo. It may also be the best bargain card with a good 40MH/s ETH hash rate when tuned. The Red BIOS editor can't yet mod the card, though.
Eliovp had a screenshot from his personal BIOS editor a few posts back (LINK:
https://bitcointalk.org/index.php?topic=5123724.msg53948630#msg53948630). I am hoping it will be ready for release sometime soon.
--scryptr
Part of copying over 1500 up timings is pretty easy to do, fine tuning them takes a little more efford, but running them on any Mining os system at this point is possible, so u don't have to worry.