If you have purchased an imp004m, this will be in RDP2 and so SWD and JTAG are irreversibly disabled. There is no need or capability to load other code into the internal flash of the STM32.
It’s also worth noting that the imp004m is a Type1MD, not Type1LD. They have similar internals, but totally different footprint and the Type1MD has an on-module antenna. I would suggest asking Murata what eval boards they produce for the Type1LD.