You should make the switch to TW, simply because Leap 15.x is on its way out. It is your Operating System that is too old, not you. In Tumbleweed and for Ryzen 2700-u, once the Kernel of a new cycle boots in MoK, it’s over up to the next one. Here, it will would be Kernel 5.3-rc1 in July or August.
Rejuvenate your inner self, do the conversion: TW is the best Linux distro. This last phrase says it all:
<<This package provides scripts and rpm macros to automate signing of the boot loader, kernel and kernel modules in the openSUSE Buildservice.>>