GNU/Linux Ubuntu 22.04 Installing Rtl8761B Bluetooth Driver Guide
How to Download and Install Realtek Rtl8761B Bluetooth 5.0 Driver for Ubuntu 22.04 Jammy LTS GNU/Linux desktop – Step by step Tutorial.
And Rtl8761B Bluetooth Driver for Ubuntu 22.04 should be present on Kernel, what may be missing is only the Firmware.

1. Launching Terminal App
Open a Terminal Shell Emulator Window:
Ctrl+Alt+t on desktop
(Press “Enter” to Execute Commands)
2. Downloading Rtl8761B Bluetooth Firmware
Download Rtl8761B Bluetooth Firmware for Ubuntu GNU/Linux
Grab both: “rtl8761b_config” & “rtl8761b_fw” Files.
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