edit: since you called linux-libre a "fork", I feel compelled to point out that Linux-Libre is just the vanilla Linux kernel with that script applied. No more, no less.
If the kernel can't load it without code changes and recompilation, due to the de-blobbing process, it doesn't make much sense to recommend to users that they load it.
https://news.ycombinator.com/item?id=29290087
...at least, I don't see any such code in the actual deblobbing script: https://linux-libre.fsfla.org/pub/linux-libre/releases/5.15....
edit: since you called linux-libre a "fork", I feel compelled to point out that Linux-Libre is just the vanilla Linux kernel with that script applied. No more, no less.