This is the manual for F4 1S AIO brushless FC board, NO receiver version. This FC board could support 1-2S power.
The stock firmware of this board is Betaflight 4.2.0 BETAFPV411RX. The Cli diff dump is in the attached file.
Want to know the wire connection with external receiver, please check the How to Connect the External Rx to the FC chapter in the product page.