From the look of things, yeah, the OXO device looks similar enough to a Gabi, just a different filter type and a different (bigger) size. If there’s a disadvantage to the Gabi, it’s that: it’s rather small, so unless you’re doing single cups, you’ll have to pour in a couple of rounds, making sure your bed doesn’t dry out in the meantime, etc. It won’t be a problem if you do single cups, so I suppose that’s what it’s primarily aimed at. Oh, and the type of filters differ, of course, so if you have a strong preference there, that might dictate the dripper/drip-assist you can use.
Either way, yes, the OXO looks to be the same kind of thing, good to hear it works well, too!
For QMK, my go-to hrm-embetterment came from Achordion. Not sure if that helps OP, but it made hrm amazing for me, and it does the sort of timing tweaks that might help here.
Otherwise, the HOLD_ON_OTHER_KEY_PRESS mode might help.