My advice: only forward ports 8080 and 443, then make sure that you have fail2ban or crossed properly set up on your reverse proxy. After that, you are pretty much fine as long as you keep on top of updating your containers.
I would be careful about which apps you proxy. Idk why you need to access the admin portal for pi hole worldwide. If you really want to do that, you should set up a vpn.
That also helps linux. Tried watching something on someone else’s peacock account logged into Linux, and got an error. Checked Google to see if it was available. A free site had it, in better quality streaming too! We ended up using her computer, but I was kind of amazed.