I have a HP Envy x360 laptop with a MediaTek 7922 network chip,
with integrated Foxconn bluetooth chip 0489:e0f2. BTW, the corresponding
wlan chip works fine with the mt7921e driver.

When booting Leap 15.5, I get "Bluetooth: hci0: Opcode 0x c03 failed: -110".

I found
https://patchwork.kernel.org/project/bluetooth/patch/20221215021854.1429-1-mario.limonciello@amd.com
which exactly matches my case. 

For completeness, here my inxi output:
#> inxi -Exxxz
Bluetooth:
  Device-1: Foxconn / Hon Hai Wireless_Device driver: btusb v: 0.8 type: USB
    rev: 2.1 speed: 480 Mb/s lanes: 1 bus-ID: 1-3:2 chip-ID: 0489:e0f2
    class-ID: e001 serial: <filter>
  Report: bt-adapter ID: hci0 rfk-id: 0 state: down
    bt-service: enabled,running rfk-block: hardware: no software: yes
    address: N/A


Could this patch be backported to Leap/SLE 15.5 ?
Thanks!