Hi,
I have 3 D-LINK DIR-842. They are supported, but only in snapshot which gives problems because of conflicts between LUCI install and current snapshot pacages.
Can i expext that D-LINK DIR-842 comes in the stable release some time ?
Unfortunately no, at least not for 19.07 which has been branched in early June 2019 before DIR-842 support arrived in late July 2019. I'm afraid for the DIR-842 it's snapshots until version 20.x.