it's a generic adapter
https://www.amazon.com/Bluetooth-Adapter-Wireless-External-Receiver/dp/B07YDFZWT8 doesn't have a brand.
the chip there is Realtek 8821CU (verified in Windows)
Okay. Let's do an attempt.
1. Shut Down your Mac.
2. Press and hold the power button and it will load the startup options.
3. Select Options and click on Continue.
4. Click on Utilities and then select Startup Security Utility.
5. Login into your account, and when prompted, enter your password.
6. From the options, select Reduced Security and also select two other options available.
7. Click on OK.
8. From Utilities, open Terminal.
9. Disable SIP using the command below
10. Restart and boot to Mac. Check SIP status.
11. From Terminal, enter the command below.
Code:
sudo spctl --master-disable
12. Open System Preferences>Security & Privacy>General
13. Unlock. When prompted, enter your password.
14. Select Anywhere from the list.
15. Download the driver from the link below
Drivers for Realtek 802.11n and 802.11ac USB Wi-Fi adapters. Packages for macOS - GitHub - chris1111/Wireless-USB-Big-Sur-Adapter: Drivers for Realtek 802.11n and 802.11ac USB Wi-Fi adapters. Pack...
github.com
16. Install the package.
17. When prompted, enter your password.
18. From Security & Privacy, you'll see that there is a new option. Click on Allow.
The system will build cache and will prompt you to restart.
19. Restart your Mac.
20. Connect your WiFi Adapter and then check if it works.