I like FreshRSS fine. I just want it to be stable and predictable and it is. The apps used to connect to it can handle how the data looks for the most part.
It’s a small program and there’s directions on how to run it on the free tier of Azure here: https://safjan.com/how-to-deploy-freshrss-in-the-cloud-for-free-on-azure/#google_vignette
I self host FreshRSS and from there can use any client on any platform. That’s an option for you if you’re self hosting inclined. I use Reeder on iOS and browser on windows.
I used Proxmox for awhile, then went to Unraid. I learned a lot using Proxmox but for ease of homelabbing, it’s tough to beat Unraid. It depends on what you’re wanting from your lab.