You can access this report from GCP Assets > Instances > License Information / Enhancements
The License column inherits data from Enhancements.
A particular instance can have many enhancements, some of which are named 'License'.
The value that you see in License field is picked up from the 'type' column of Enhancements table.
On the Asset Report, the values prefixed by license:
on the Enhancements column would match what you see in the Licenses column.
Enhancements can be of different kinds like gpu, ram, etc. but they are mostly licenses.