Looks like the 5.8 kernel includes support for that device, remember Android runs on an old 4.19 kernel (even my Pixel 4a 5G running the latest Android 12 runs on the 4.19 kernel). Other dongles like the one from Panda (it's Bluetooth 4.0) should work out of the box on Android, and should passthrough with KVM - https://www.amazon.com/dp/B00BCU4TZE/ - this is the dongle I use in general on my PC for headphones and it was plug and play - it comes with a disk and I never even touched it - thing's as easy to use as a mouse.
Yeah, I'm a big fan of the Panda Wireless products - they make both Wifi and bluetooth dongles. Here's their Bluetooth dongle, it works out of the box - no disk or installation of any kind is needed (except maybe on Windows), just plug in and it works: https://www.amazon.com/dp/B00BCU4TZE/
Yes, and installation would be much simpler.
I have been fine with a very cheap one from Amazon a long time ago, but I know that isn't the case for everyone. Doing a quick look at what's available now, these things still seem to get a lot of varying reviews, so I can't say for sure.
This looks pretty good though: http://www.amazon.com/Panda-Bluetooth-4-0-Nano-Adapter/dp/B00BCU4TZE/ref=sr_1_10?s=pc&ie=UTF8&qid=1435962220&sr=1-10&refinements=p_n_feature_keywords_browse-bin%3A7800094011
The Panda Wireless products, like their Bluetooth dongle work out of the box. It's what I use on my desktop PC, out of the box, plug and play, no software needs to be installed - couldn't be easier.
I've been rocking a USB Bluetooth adapter from Panda since 2014. They specifically advertise as Linux compatible and have had no issues with it on Windows and Ubuntu/Pop.
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Here is the specific adapter, they might have newer ones with more features now tho.
https://www.amazon.com/gp/product/B00BCU4TZE/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
Can you provide a link to the Bluetooth adapter you tried to get to work?
FYI my recommendation for Bluetooth adapters is this one from Panda Wireless: https://www.amazon.com/dp/B00BCU4TZE/ref=cm_sw_r_apan_glt_i_64ENNF2YJR9T444K2XVA
The company panda wireless makes Bluetooth and wifi dongles that work out of the box. Have a look at their product page for Amazon links. For example their Bluetooth adapter: https://www.amazon.com/dp/B00BCU4TZE/
I'm using this Panda PBU40 receiver.
And I'm running 5 meters of this LED strip as well as these LED rings. I'm not quite sure how I'm going to be able to control the rings, I was going to conect them to the 4,5,6 spots on this pwm driver. I'm not quite sure which raspberrypi I have.