Add them after quiet argument?
So you are saying that
Code: cmdline.txt
boot=UUID=2901-3633 disk=UUID=b4dcdfde-4873-4c35-9e80-6506818fb1ce quiet rw,noatime,ssd,discard,subvol=/@libreelec
will result in equivalently mounted filesystem on block device with uuid "b4dcdfde-4873-4c35-9e80-6506818fb1ce" as with