What about conky?
You can have multiple instances running with different configs all drawing on the desktop. In addition to the time you can have a bunch of system monitors running as well if you're interested.
Pop!_OS is a free and open-source Linux distribution, based upon Ubuntu, featuring a custom GNOME desktop. The distribution is developed by American Linux computer manufacturer System76.
What about conky?
You can have multiple instances running with different configs all drawing on the desktop. In addition to the time you can have a bunch of system monitors running as well if you're interested.
I actually found that one last night while searching, however I like being able to have a series of tiled windows on my second monitor and needing to minimize them to check the time seems less convenient than looking at my phone or buying a desktop clock.
Really cool idea though, but i tend to never have my desktop visible. Ill probably install it on my homelab though!
You can customize the window type in conky, so you absolutely could configure it to be a normal window.
Well i am also trying to avoid having a clock as a window jockeying for screen space with my other tiled second monitor. I was trying to find a solution that plays on the topbar or dock as they take nearly no space on screen.