Thanks for the info!
A 6T just arrived today and I successfully installed Ubuntu Touch. I couldn't get the windows installer to work, but the Linux Mint installer worked perfect.
It's a great looking operating system; it's more polished than I would have thought. The Suru dark mode on Ubuntu Touch is significantly better than the original android 9 high contrast mode. I appreciate the security features. It runs well. I haven't tested the calling/texting yet, but hopefully soon. It runs 3D games with zero lag. This thing is a hot rod. Finding a decent secure phone has been a difficult task, but I think this will be perfect.
Thanks again.