Support for NUCLEO-H755ZI-Q: enable flash debug

Hello ST team,
I have not use the mbed studio yet and I’m a pure novice.

I’m reading through this porting guide and Porting - Porting | Mbed OS 6 Documentation are wondering how to enable the features to “debug flash” and “deploy and debug target”. It seems that these require extra steps.
Has someone experience with this and can provide the necessary information how to enable these?

Does this documentation describe the necessary steps: Enabling debugging for unsupported boards - Monitoring and debugging | Mbed Studio Documentation?