I would like to clarify that this is expected behavior.
Also, after consulting with our RnD team, they confirmed that while the option to delete all available sections might be considered for future development, there are currently no plans to implement it. Furthermore, a full configuration deletion is unlikely to be introduced, as retrieving the complete configuration is not supported at this time—only specific sections can be accessed.
The only solution we can currently offer is to retrieve the sections and filter out the IDs.
You can delete multiple filtered IDs in a single request using the following command: api delete /modbus/client/tpc/config '{"data":['1','2','4']}'