There is a proposal in upstream GlusterFS to drop 32-bit arches.
The original proposal was to drop 32-bit with GlusterFS-7. GlusterFS-7 will
land in Fedora 31/rawhide soon. More than likely though it will not be
official until GlusterFS-8, which will probably land, accordingly, after
Fedora 31 GA in Fedora 32/rawhide.