How do I audit IT software asset inventory management?

NIST 2.0 has the following framework requirement:

ID.AM-02: Inventories of software, services, and systems managed by the organization are maintained.

How would I check the completeness and accuracy of our software asset inventory? What should I ask to see? I am looking to test this as part of a broader NIST audit but not sure how to verify compliance for this one.

Things I can think to ask for:
1. Software licenses
2. On-prem applications list
3. Third party applications …

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