I tried the Flatpak first. But it was using old glibc(?) I think. My system was up to date with Coop requirements. Based on what I understand the Flatpak uses its own environment and packages. But I'll try with a up to date Flatpak version and send you the report.

My experience with the Snap:

It was smooth, but when I tried clicking on icon, it said Exec is not specified in app fields. So I changed the Snap app file and did it manually.