@MS Techie Researched on your ask, here is the Access review API - https://learn.microsoft.com/en-us/graph/api/accessreviewset-list-definitions?view=graph-rest-1.0&tabs=http which will help to get the details of the Azure AD Access Review, however the information related to group whether it is onprem AD or Azure AD group, cant be found via this access review api, we can get the groups information via this API - https://learn.microsoft.com/en-us/graph/api/group-get?view=graph-rest-1.0&tabs=http only.
Let me know if you have any further questions, feel free to post back.