Hi @mboisson , I’m afraid Badges were deprecated from the platform in Palm and removed in Redwood, see Open edX Redwood Release - Developer and Operator Release Notes — Latest documentation
The DEPR ticket says:
Credential sharing to external network via Open Badges 3 will be possible via the credential IDA. The initial reference implementation will support interactions with the Digital Credentials Consortium wallet.
But it looks like that feature wasn’t added to credentials until Sumac, when Credly integration was added, see feat: add badges feature by kyrylo-kh · Pull Request #2489 · openedx/credentials · GitHub
I haven’t used this yet, so can’t offer any further advice – but if you do figure it out, could you post your solution here so others facing this issue can benefit from your experience?