bluetooth didn't work for me (couldn't enable in ui). when looking at dmesg
I noticed:
[ 8.826625] Bluetooth: hci0: RTL: examining hci_ver=07 hci_rev=000b lmp_ver=07 lmp_subver=8703
[ 8.830835] Bluetooth: hci0: RTL: chip_type status=0 type=5
[ 8.834965] Bluetooth: hci0: RTL: rom_version status=0 version=1
[ 8.834989] Bluetooth: hci0: RTL: loading rtl_bt/rtl8723cs_xx_fw.bin
[ 8.850225] Bluetooth: hci0: RTL: loading rtl_bt/rtl8723cs_xx_config-pinephone.bin
[ 8.850316] bluetooth hci0: Direct firmware load for rtl_bt/rtl8723cs_xx_config-pinephone.bin failed with error -2
[ 8.850323] Bluetooth: hci0: RTL: mandatory config file rtl_bt/rtl8723cs_xx_config not found
I could not find a -pinephone.bin in other distributions but they typically use older kernels