Reading really isn't your thing is it
i tried but it didn't help :/I did have a WiFI problem when I upgraded from Android 10 to 11. Check this:
Hal9k Mod v5 based on Android 10 for MTCx HCTx Rockchip PX5 (rk3368), PX6 (rk3399) and PX30 (rk3326) head units Compatible MCU versions: MTCD_XXXX, MTCE_XXXX, MTCP_XXXX, MTCH_XXXX, HCTG_XXXX Firmware version: 5.0.0 (31.07.2021) Version of the...forum.xda-developers.com
Correction: When Upgraded from Android 9 to Android 10. (sorry)
I can confirm that this does the trick, the BT app works fine again. Use "Total Commander", give it the "root" rights, rename the "gocsdkrf210" file in "/system/bin" (e.g. in "gocsdkrf210_old"), then copy the given "gocsdkrf210" file in "/system/bin" giving it the right permissions (755) and the right owner "2000_Shell", then restart the device and that's all!
You don't need to uninstall navradio, It's enough to disable the speedometer in NavRadio settings.