In short - it depends on your deater.
As some others on this forum have mentioned, if you request a SW update some dealers may try to charge you by quoting that MG don't reimburse them for their work/time (and some updates can take hours to complete - tho the infotainment system usually only takes minutes) and SW updates aren't part of standard service, unless a recall applies.
But if you approach your dealer with list of problems you have, very often their go to response will be a SW update to address them, and as this will be agreed with MG, the dealer will be paid for their time.
Bottom line is tell them you want your issues sorted, how they achieve that is for them to decide, although there's probably no harm suggesting that you've read on a forum that update xxxx sorts the issue.
I think most people would agree with view that we don't care what SW version is installed as long as car functions properly.