Welcome, @MAlsu.1, to the community!
The NanoVNA was already released five years ago by a Japanese developer and is using an STM32F072C8T6, but it is not a product of STMicroelectronics. In the meantime, many ST tools have been further developed, e.g. DfuSe and other programming tools have been replaced by the STM32CubeProgrammer.
However, the developer of NanoVNA also writes in his documentation that it can also be programmed via SWD. If you have further questions, the community of NanoVNA will surely be able to help you.
Regards
/Peter
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