

You said
I’m only really running a caddy reverse proxy on the VPS which forwards my home server’s services through Tailscale. "
It seems then that you are using a Tailscale Funnel to expose your services to the public web. Is this the case? I ask because the basic premise of Tailscale is that you have to be logged into your Tailscale network to access the services and if you are not logged in, then the site you try to access won’t even appear to exist. Unless it’s setup via the Funnel.
Assuming then that you setup a funnel, then you are now 100% exposed to the WWW. AI Bots and bots in general crawl the WWW daily and eventually your site will be found. You have a few choices here, rely on a Web Application Firewall (WAF) such as Bunkerweb which would replace Caddy, but would provide a decent firewall of sorts. Or…you can use something like Config Server Firewall but I’m not sure if they have AI Bot protection. The last I used them was before AI was a thing.
Pushed Wireguard back onto my network. I’ve been a Tailscale user for a couple of years, but never really saw the need for it for me as I’m the only user of the service. :)
I will freely admit though, there’s nothing wrong with the service and honestly is great if you are behind a CGNAT router or don’t want to use Cloudflare for your tunneling.