Mobile app: …More > Settings > Backups
But you don’t really have to do anything when you have a Homey + subscription.
Here you can view your backup (status): https://homey.app/nl-nl/account/backups/
That only is about the Antennas,
everything else is completely different as The bridge does not run Homey Apps / flows - That is done completely in Homey (Cloud).
Beside that the Homey Bridge has the Old Zigbee chip, not the New one they where talking about in the last AMA about Antennas and certification (FCC, CE, etc. )
There is no migration from the Homey (cloud) with or without Homey Bridge, to a Homey Pro
and I would be surprised is they come with that before Christmas 2023, if ever…
The path to joining the network, settling for a bridge, subscribing and eventually upgrading to a pro is just well thought out if you ask me.
This journey should be enriched with easy migration and a decision to keep the bridge for greater network reach. Everyone is happy and Athom’s business model is being stretched in the right direction.