You can dock the MIDI editor window, if that helps. So then it'll always appear in the docker area (however you set it up).
I don't use LV2 at all since I didn't start with any other Linux DAW (not counting years ago when I briefly tried it, because so much has changed since then). I see some LV2 that I'd like to try in Reaper if that functionality becomes available, but I'm ok with JS and Linux VST for now. I won't die without LV2.