I don't know if you want the commercial offering of openvpn.
If you can work with the community version (which also makes pointless the use of a Let's Encrypt certificate), check these projects:
- GitHub - Nyr/openvpn-install: OpenVPN road warrior installer for Ubuntu, Debian, AlmaLinux, Rocky Linux, CentOS and Fedora
- GitHub - angristan/openvpn-install: Set up your own OpenVPN server on Debian, Ubuntu, Fedora, CentOS or Arch Linux.
(There are similar projects for wireguard, but wireguard is easy enough to setup without)