You could use Zerotier. With zerotier you can create a private network between your server and as many as 24 other devices (i.e your phone, your laptop...)

It doesn't expose your stuff to the whole internet. You have to manually approve the devices you want to add to the private network through zerotier website. Even if you share the links with other people, they will simply not work

I just did this for my Raspberry pi, and now pihole filters my internet traffic even when I'm away.

Seriously, look it up, it's free up to 25 connections and since it's private you don't need to go crazy about protecting your server from DDoS or buying a domain name or anything.