Yes these are native Broadcom cards that are used in real Macs. Almost all continuity functions will work (like AirDrop, Apple watch unlock, etc)...but the big issue has always been Bluetooth interference which runs on 2.4Ghz.
These cards are unshielded and I have never personally had an amazing success with Bluetooth stability (that is even streaming to an AAC based headphone like AirPods or Bose QC35II's)....especially when there are other 2.4Ghz devices around.
On real Macs, iPhones and so on, this kind of interference is not an issue at all.
If you don't really care about Bluetooth stability if you have interference around, I guess the Wifi/BT cards are a must.