Have you tried connecting any services which require local network access/service discovery? I wasn’t able to connect to my Philips Hue bridge using this compose file because the Hass container–being in that 172.16.13.0/24 internal network–isn’t seeing the broadcasts from the Hue bridge in my physical network when I push the button on the bridge. I was able to get this working using a MacVLAN, but it’s a bit clumsy, and I’d prefer not to use MacVLANs if I don’t have to.