The URL "http://www.scim-im.org/projects/imengines" used in the URL tag for the binary package scim-m17n is outdated. https://github.com/scim-im/scim-m17n appears to be working.
FEDORA-2021-6120d8c93a has been pushed to the Fedora 35 stable repository. If problem still persists, please make note of it in this bug report.