I've just seen a quoted reply by an Akkoma user.

Curiously, these messages mark the replied post differently (i.e. not using an inReplyTo field, but a quoteUrl one). I don't know if this is an ActivityPub standard or a private extension.

Anyway, I'll write it in the TODO file to take a look at it in the near future.

Thanks for the suggestion.

CC: @gyptazy@gyptazy.ch