It would be nice I guess.
Regards!
No reaction… Hm… Isn’t Group a one of three basic artifacts in BPMN standard?
It is indeed a very basic symbol but it’s also very rarely used in reality and has no bearing at all on execution which means there isn’t a lot of push from users to implement the symbol.
That said… there is of course a discussion about implementing it on the github page, might be a good place if you want to make a case for supporting it.