Here is a draft checklist I would use for the Final Inspection and Testing department with references to the applicable ISO 9001:2015 clauses:
Final Inspection and Testing Department Audit Checklist
Clause 7.1.5 - Monitoring and measuring resources: Are the inspection and testing equipment calibrated and maintained?
Clause 7.1.6 - Organizational knowledge: Do inspectors and testers have appropriate knowledge and skills?
Clause 8.2.4 - Monitoring and measurement of product: Is there a documented procedure for inspection and testing with acceptance criteria?
Clause 8.3 - Control of nonconforming product: Is nonconforming product identified, documented, and dispositioned properly?
Clause 9.