In Bliss OS 11, parameters for kernel modules specified in kernel cmdline don't work at all. But work in Bliss OS 14/15.
I too had this issue when I had to set psmouse synaptics_intertouch=1 for my touchpad to be able to multi-touch with more than 2 fingers at once. Then ended up loading kernel modules manually with a gearboot script.
Gearboot documentation -
https://wiki.aopc.dev/gearlock/developer-guide/gearboot-documentation/#gearboot-documentation
We will hook to init stage as it should be done before android init is executed and kernel modules are loaded.
Simply create a script in /data/ghome/gearboot/init/ with following contents :-
#!/gearlock/bin/bash
rmmod amdgpu; modprobe amdgpu freesync_video=1
And then reboot, note that it won't work when Android is running as there might be programs accessing the GPU.