The relevant template(s) at https://gitlab.com/gitlab-org/gitlab/-/issues/new appear(s) to state(s) that feature requests should be posted here in conjunction to https://gitlab.com/gitlab-org/gitlab/-/issues/new.
Added the ability to set separate Libravatar and Gravatar avatars per user.
Some people prefer Gravatar, others Libravatar. Currently, they are bound to the decision of their administrator regarding which they are permitted to use for their account. Since both types of avatar acquisition exist, one should be able to serve as a fallback, and the user should be able to choose which is their primary preference (thus removing the ability to exclude one offering, at least by default).
Each user should be able to set a separate Libravatar and Gravatar avatar.
Developers, presumably. Not many other people use Libravatar.
I can’t assist with this.
Not to my knowledge.