As the summary says, the base arm64 profile parents off little-endian so having big-endian profiles is rather difficult currently. This should also be fixed. Reproducible: Always
If we can reach consensus on a good way to move forward to this, I have been doing work on profiles recently, and can fill in the missing pieces. Would we rather create a separate BE sub-profile (under arm64/17.0) overriding the little-endian-ness, or split to have little-endian and big-endian ? I have taken the initiative to implement musl/uclibc profiles for blueness under https://github.com/gentoo/gentoo/pull/10120
per steev, this bug can be closed. BE profiles can be selected individually now and will be separated when deciding which profiles to stabilize.