Can you tell me how that works?
I only know of manually adding the H.A. devices per Home Assistant community app.
(I prefer it over the ‘official’ Home Assistant app)
Manually, like the way I just described.
For the other way round, you can give this brand new HA integration a go:
https://community.homey.app/t/home-assistant-integration-for-homey-now-available/148786
Create an API key, install the add-on per HACS, and it connects to all of your Homey devices, zones, flows and moods, with options to deselect or remove unneeded Homey items.
Note: it’s still a work in progress!