If the JLCPCB assembly service is used (recommend), J5 is populated with a pin header instead of a socket. This was intended to be hand assembled, so should not be populated at all. Remove it from the BOM/CPL files
Update the footprint used to solder the button wires to so it is a 2x2 2.54mm grid, allowing a connector to be fitted if desired
If the JLCPCB assembly service is used (recommend), J5 is populated with a pin header instead of a socket. This was intended to be hand assembled, so should not be populated at all. Remove it from the BOM/CPL files
Update the footprint used to solder the button wires to so it is a 2x2 2.54mm grid, allowing a connector to be fitted if desired