I’ve seen some tutorials and videos.
They all show how to add devices the hard way or discovvery is “just working”.
But how can i get local tuya to discover my existing devices?
Without cloud api, it should discover all devices (with their ip addresses) but you still need a cloud api to fetch keys. You can take care of fetching manually or let to be handled by integration.
if your network is segmented (different sub networks or vpns) do not expect discovery, it should be relying on broadcasting messages and these messages cannot be accessed between networks