I am wondering if anyone has tried to use and/or had success using the MSMDownload Tool on Zorin? I downloaded it and it seems to run but I am having issues with my phone and I do not know if it is my phone (OP6) or the platform handling the app. Thanks for any feedback.

Have you bricked your 1+ 6? I had an issue where I bricked a 1+ 3 as I was messing with e.OS and somehow deleted something I shouldn't have. The tools I used were adb (under Windows - I never got it to work under any Linux even though adb is in the repos) and TWRP.