https://gcc.gnu.org/gcc-8/criteria.html lists the little endian platform first as a primary target, however it's not mentioned for GCC 9 and GCC 10. Just an omission?
https://gcc.gnu.org/legacy-ml/gcc-patches/2018-07/msg00854.html suggests that the little endian platform should be mentioned, and maybe the big endian platform should be dropped? Jakub suggested to fix that for GCC 9 and GCC 10, and get a consensus for GCC 11. Matthias