Hi @jlpnea
Apparently my search-fu is lacking, because I have just posted about this problem.
In my case I don’t want to use Tailscale Funnel since this (afaik) exposes the whole instance, I just want to share the /s/ route. Cloudflare Tunnels seems to be route-aware but brings other problems for so my page does not correctly load due to Javascript assets not being found (/dist folder).
@Felix2M , regarding your secondary instance: would that imply a two-step process? First share to other instance. From there, share publicly?