I haven’t. Has that worked for you?
If you have one of Apple's Intel Macintoshes with a T2 security chip, you may want to do a search with ChatGPT through one of the free portals out there to boot something "foreign" to what Apple's secure boot with the T2 security chip already recognizes.
When putting together rootfs on top of what others would consider to be "complicated", reaching for rEFInd when I should probably have run a small PXE server off a Pi did speed things up. rEFInd has been a good general purpose bootloader, simple tool.
In my aged existing familiarity with rEFInd, its docs may not spoon feed you the answer but if you know what you're looking for and what you want to do can be done, you'll find it.