Pagekite is useful for that purpose, not free, but not expensive. (Only works on their domain)

or if you are after something more "commercial grade"

A Cloudflare Tunnel (works best if you have your dns/domain with them), which takes your http service, gives it any url you like at your domain and adds SSL along the way. Imagine https://vmix.yourcompany.com/ if that's what you want.

Both these solutions get around having no static external IP address, which is the primary reason I use them. I'm frequently using Carrier Grade NAT type connections like Starlink and 4/5G Mobile type services, this allows you to run any web servers behind those services with ease. They both help with making them https:// and making the SSL key for you on the way through to the edge server.

Yes you can do the same with Nginx and from what I can tell both these services are a proprietary tunnel out to an Nginx server hosted at high performance data centres close to you :)

There is a learning curve to set those up, but if you know how to setup Nginx you are probably ready to learn either of the above, just read the manuals and stick with it. It's remarkably easy to deploy after you get your head around it.