I have an old laptop (+10 years) which had working Bluetooth on Windows last time I tested it a few years ago. It won't work on Zorin, though I haven't tested any other distros.
The bluetooth adapter should be there (it's internal) but blueman gives an error saying no adapter's found. My issue is a lot like this one.
The following was under Network in the output of inxi -Faz.
Did a websearch using "Intel Corporation PRO/Wireless 5100 AGN Ubuntu 20.04" found this, but no real solution except keep to WPA2 from router and no more.
Thanks, I've already downloaded the microcode but I'm not sure if I need it (or how to "install" it without compiling a custom kernel) since the wifi is working just fine.
I wonder if adding Blueman app may help. Blueman has been suggested to help solve Bluetooth issues before.
I don't need/use it myself, so others may have more to say about it.
This is not surprising. Bluetooth is often combined into the Wifi Card (which makes sense to do).
But this does not mean it always is. This creates confusion as to whether or not it is there.