With October 2019 changes to the IP Policy, there is no longer any notion of Type A or Type B IP due diligence.
FWIW, the due diligence type (when we made the distinction) only ever applied to third-party content. That the initial contribution (which our policy and process refers to as "project code") was labeled "Type B" (and that the notion still exists) is a function of the EF not having resources to align the tools with the policy updates.
For completeness, all third-party due diligence is concerned with license compatibility (what we used to refer to as "Type A"). The IP Team will, at its discretion, dive deeper into provenance and other aspects of the due diligence process that we previously referred to as "Type B" only when they feel there is some value in doing so. So, strictly speaking, the project team can't request a deeper dive, but they can certainly hint to the IP team that there are areas in some particular bit of third party content that require deeper scrutiny.
The IP team always does a deep dive on project code contributions.
TL;DR: the "Type A/B" flags are meaningless under our current IP Policy.
HTH,
Wayne