2 Swag Instances to 1 Cloudflaire domain

I have the arr stack and immich running on a beelink S12 pro based on geekau mediastack on GitHub. Basically, and I'm sure my understanding is maybe a bit flawed, it uses docker-proxy to detect containers and passes that to swag, which then sets up subdomains via a tunnel to Cloudflaire. I have access to my services outside of my LAN without any port forwarding on my router. If I'm not mistaken, that access is via the encrypted tunnel between swag & Cloudflaire (please, correct me if I'm wrong).

That little beelink is running out of resources! It's running 20 containers, and when immich has to make any changes, it quickly runs low on memory. What I would like to do is set up a second box that would also run the same "infrastructure" containers (swag, docker-proxy), and connect to the same Cloudflaire account. I'm guessing I need to set up a second tunnel? I'm not sure how to proceed.