

There’s no certificate at the VPS level. It forwards everything to and from the self hosted reverse proxy.
Now that you mention it though, there may be a slight complication with pinning the reverse proxy to the domain API for cert renewals. I’ll have to check how I have mine configured but I may have given my reverse proxy a IPv6 and configured that for cert renewals.
That would mean some down time as you update the IP if your ISP rotates it.
I use Minica and it’s insanely simple to use. Terminal based though.
https://github.com/jsha/minica