Please check ISO 9001:2015 clause 7.5.2 c). Each organization has the authority to determine what is to be considered the appropriate review and approval for suitability and adequacy. Many smaller or centralized organizations decide that all procedures are approved by the owner or General Manager. Bigger and or more decentralized organizations determine that different documents can be approved by different functions and one or more functions. As a consultant, I ask organizations to write a document register where the authority to sign off each procedure is written, and that document is approved by top management. Showing clearly who has the authority to approve each document.
You can find more information about the documentation below: