Can you clarify this?
Are you saying that on Fedora, it did work or did not work?
One thing about Fedora is that it is Cutting Edge. If there is a regression in the kernel/driver for "radio" (Bluetooth) - that is present on both Zorin and Fedora - you would see the symptom on both - so it does not rule out a software issue.
You might test on an older stable build like MX LInux or Debian.
Yes I have used gnome desktop, Xfce, Cinnamon, and Fluxbox. But never KDE Plasma. The names are different and will take a little while to get get use to.
Hmm ... maybe Plasma supports it in a Way that the others don't do ... You could install the Plasma Desktop on Zorin, too. but this would be only the default Plasma desktop without any Zorin Customization - and an older Plasma Version.
The problem is that I screwed up tiring to set up a duel boot with Zorin and MX. I don't know how I did it but I could not get to either distribution. I got really frustrated and installed MX using the whole hard drive. Now I am going to install Zorin with KDE plasma and dual boot