SOOOOOO, after receiving a notice from my ISP that I need to stop accessing UK content or legal action will occur, I got a VPN. ProtonVPN. (And yes, the free plan, as I am a broke person. The free plan does not include the config files, sadly) Included with my account is an OpenVPN account login. Now, I'm not a noob when it comes to kodi, but I cannot figure out how to use an OpenVPN account with either the OpenVPN extension or the Manager for OpenVPN. And I did Google it, and just got back crap that doesn't help. SO I am asking you many people of this forum, How do I do use my OpenVPN account detail given to me by ProtonVPN on my Raspberry Pi 3B+ running Libreelec 9.1.002 ? I was told to move this here by someone on a different forum.
I'm guessing the alternative they're offering you is to use their software to connect. VPN Mgr uses the config files that they're not giving you so that it can connect and manage the connection itself. It doesn't have a way of interacting with third party software to do this.
So your choices are : sell a kidney and pay for a VPN that does give you config files; or run Kodi in an environment where you can also run their software, but accept that you need to manage the connection yourself (so no connected only when needed in Kodi).