MSGraph API TermStore relations not returning set, fromTerm or toTerm

Question

I am trying to build a DB replica of the TermStore contents with both parent/child relationships and Reuse relationships.

Using the latest Microsoft.Graph API 5.64.0 and Microsoft.Graph.Core 3.2.1

Issue 1 - Term store does not return some data:

var relations = await graphClient.Sites[sharepointSiteID].TermStore.Sets[tsSet.Id].Relations.GetAsync();

It returns relations but each relation is missing the set, fromTerm and toTerm components

Is there any way I can get these from that call or elsewhere?

Issue 2 - Children list does not return any reused terms

Any ideas?

Thanks