Yes and no. You can use HA as a "bridge" in HomeKit for example.

So you add your automation crap to HA, scan a QR code from HA and everything pops up in HomeKit

For me that was a bit oof, as it literally adds _everything_. So I just use Apple TV as a HomeKit hub with the basic stuff added directly to it and a few specific devices (Shelly) bridged from HA using a whitelist.

This way the WAF stays high and Siri works properly.

HA still does the more complicated stuff (ATV is on pause -> make lights in the TV are a bit brighter. ATV playing -> dim the lights according to the time of day etc.