@stylste the kernel 4.20.16 is the one shipped with the iso. If you update your system (which is something you must do), you'll get the kernel 5.3.18 (or 5.4.8 after this Friday sync).
The version 5.2.2 you're reffering to is an old version from last July, no idea from where you got this in all cases it means your system is not up-to-date and it's bad.
BTW, there is no reason to have a custom compiled kernel since the module you're reffering to is available by default on Solus as you can see here