Tailscale and proxy

Hi all,

I am using tailscale for both mesh and tls/ssl.
When connected I can reach my Home Assistant with home.xxxx.ts.net.
That works perfectly, and shows 10.1.1.2:8123.

Now I want to reach my router at 10.1.1.1 I can do this becaus tailnet is on. So I can browse it. But I would like to have a proxy, so I dont need to deal with certs.
router.home.xxxx.ts.net

I tried Ngnix proxy manager but did not succeed.

Maybe I dont need a reversed proxy? Is there a way to reach via a sub domain my router. Which is already exposed by IP via tailscale.