Great news to see these topics going forward 
Small typo here : I think you’re talking about Nicolas Chauvat (@nchauvat here)
We exchanged some links with forgefed creators back in octobre 2019, but it didn’t go any further : https://talk.feneas.org/t/any-use-for-the-semanticweb-ontologies-for-forgefed-doap-for-example/170
Maybe further contact can be established using the forum : https://talk.feneas.org/c/forgefed/10 before the two projects grow further apart ? Oh and since this is related to ActivityPub too, you might have some luck contacting them on the fediverse : ForgeFed (@forgefed@floss.social) - FLOSS.social & fr33domlover (@fr33domlover@todon.nl) - Todon.nl & https://floss.social/@bill_auger (although there doesn’t seem to be recent activity).