The only other option I can think of is getting USB Bluetooth dongle. I have one with CSR (Cambridge Silicon Radio) chipset which works very well in Linux.
I read from the previous messages that it's just the sound problem, because the speaker connects. But are you sure that it's connects because a millisecond doesn't say much.
Perhaps it's a driver or adapter thing that isn't (yet) available in Zorin for your speaker.
Might it connect and not produce any sound, then I would say try it like FrenchPress advises use a Bluetooth dongle. Those don't cost much these days. It would be sad not to be able to use your speaker with the PC/ZorinOS. But now we know that bluetooth 5.0 is not the problem.