The organization must inform third parties with whom personal data has been shared of any modification, withdrawal or objection affecting that data and must implement policies, procedures or mechanisms to do so, taking appropriate steps bearing in mind available technology, determining and maintaining active communication channels with those third parties, assigning responsibility for operating and maintaining them, and monitoring the third parties' acknowledgement of receipt.
ISO 27701:2019 7.3.7 is one control. If you already hold one of the frameworks below, a reviewed crosswalk already says how much of ISO 27701:2019 your existing evidence covers. Hold SOC 2 and 58 of 108 ISO 27701:2019 controls already carry evidence.
Each report names every control your existing framework evidences, every one it does not, the reasoning behind each claim, and the claims that were argued against and rejected. 289 were rejected on the SOC 2 pair alone.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.