Velux Active | Cloud

Hello! I have a HA instance that I use to control several apartments. Therefore the HA installation is running on a server that is not at the same location as the Velux KIG300 that I have to control my Velux windows. As far as I found out, there is an integration via Homekit possible. But isn’t a major requirement for homekit, that all devices must be in the same LAN?

Any idea, how it is possible to integrate Velux windows if they are not in the same LAN as my HA server?

BR
Christoph