Currently, the PSoC6MCU DFU Basic(CE213903) can only work with dual core, as the batch file to create the downloadable file can only be effective for cm4 core.
However, are you planning to support single core?
Could you also share bootloader sources host file for the PSoC6, as these are incompatible with the previous PSOC4/5.
It looks there is no concrete schedule to support single cm0+ dfu in PSoC Creator. In MTB, this is also not supported, as the cm0+ is hidden for general user.
As for the " bootloader sources host file for the PSoC6" you mentioned, whether you meant the source code of dfu host tool launched from PSoC Creator?