What’s possible as well:
Install Home Assistant on a Synology NAS, or run a HA VM image on a pc/laptop/thin client, or buy HA Green;
Then:
Sync Homey to HA → tutorial
Floorplan dashboard example:
https://github.com/ExperienceLovelace/ha-floorplan
Building such a floorplan seems to be a ton of work. I like it, but wasn’t tempted to start with it yet.