ISO 37301:2021 4.3: Determining the scope of the compliance management system
To fix the scope of the CMS, the organization shall decide where its boundaries lie and where it applies, taking account of the internal and external issues identified in 4.1 and of what 4.2, 4.5 and 4.6 require. It should make plain the main compliance risks the organization faces and its geographic and organizational limits, especially where it belongs to a bigger entity, and shall be kept as documented information.
This control maps to 11 controls across 11 other frameworks. If you already hold one of them, the evidence you collected for it is the starting point here rather than new work.