also this repo is quite old, the original source is at framagit https://framagit.org/hubzilla/
yes, i think it should be since due to hubzilla's federated login this becomes a federated marketplace where a person from a different hub can buy/sell from/to people from other hubs seamlessly.
hubzilla does marketplace too, it has a cart plugin that lets a user host their own shop. should be updated

thanks, hubzilla is meant for individuals and is more of a publishing/online presence management platform. definitely worth trying if you want to try something new.
And i have tried your suggestions and communications seems to be only one way lemmy -> myhub. the other way i get a 403 error in delivery reports.
i've been a huge fan of hubzilla, it lets you host a complete website, events, wiki, chat, shopping cart, crossposting etc. anything you could ask but it had a downside that the UI was built on php and made things difficult for a newcomer. As of now this issue is also being solved by a modern responsive theme built by me. its an experiment but coming along fine, eventually it would be support all of hubzillas features coupled with a neat UI. I'm testing this on my hub and can be previewed at https://utsukta.org/channel/utsukta-themes
posting from my lemmy account because for some reason lemmy.world rejects my comments from my hub.
hubzilla has private forum/group feature.
this portable identity feature has existed for a number of years in hubzilla, its implemented as its own 'zot' protocol, offering nomadic identity as well as account cloning(redundancy).
hubzilla has wiki feature but its federated over zot protocol, you can share updates via activitypub(it has both) as status updates but to collaborate on a wiki people will need to be on zot supported platforms.