A Twingate Home Assistant Addon would be great. It’s offers something that neither a VPN nor Home Assistant Cloud does by acting as a proxy beteeen your resources on your network and clients you want to give access to your network or individual resources. It’s not a VPN, but provides VPN-like features.
Where is the source?
Docker container
You probably should vote for your own suggestion 
I want one… twingate can exclude direct port which is great rather then using tailscale or zerotiers
An addon would be great, but I wonder if someone should just try running it in docker on HAOS?
It runs in docker in supervised, I guess it will also work in HAOS.
You need the Advanced SSH & Web Terminal addon with Protection Disabled.
Then just enter the docker command that the docs supply for you
How about an open source alternative to Twingate called OpenZiti. Like TG, Ziti is focused on being a zero trust overlay network (i.e., VPNs focus on connecting devices, ZT focuses on services. I work on the project and have colleagues who use it with HA:
I know this thread is a year old now but did anything come of it? I tried looking at the AddOn documentation to see if I could figure out how to make an addon. was able to create the sample Hello_world addon but don’t see any examples for creating an addon with a specific Docker container and passing parameters to that container.