If range hood only and remove microwave from the equation, a couple of people have tried to make their range hood smart:
- Automating my Kitchen Rangehood Fan and Light (madebynathan.com)
- Making a dumb cooker hood smart - Hardware - Home Assistant Community (home-assistant.io)
- Smart stove range (this might be a long shot) - ESPHome - Home Assistant Community (home-assistant.io)
- Exhaust Fan Controller for Range Hood | Hackaday.io
So not for everyone, but probably not difficult either… arguably easier than finding some off-the-shelf AND with microwave unit that would fit your needs.