Set up a VPS. Create a VPN tunnel from you local network to the VPS. Use the VPS as the edge router by opening ports on the VPS firewall and routing incoming traffic on those ports through the VPN tunnel to servers on your local network.
I used to do this to get around CGNAT. I ran RouterOS in a Digital Ocean droplet and setting up a wire guard tunnel between it and my local Mikrotik router.
It will obscure your local WAN IP and give you a static IP but that's about the only benefit. And you have to be pretty network savvy to configure it correctly.
It does not make you immune to DDoS attacks and is honestly more headache to maintain (albeit just a small headache).