Hi @Daniel_Marshall, and welcome to the community!
Ergo, given any specific record selected in Table 1, show me all the rows in the linked Table 2 that it references, right?
I don’t believe there is a way to visualize this in the UI. This is a typical one-to-many relationship and we are at the mercy of the UI I’m afraid.
Ideally, you want to see the collection of related [child]rows in context to the parent row. Indeed, you should not only be able to see these related rows, you should be able to edit parent and children in a unified view.
This is technically possible with a script block and a button field that would call the script which would locate the records and display all or selected fields in a block on the right like this. What I’m showing below is a search engine that I created that given a specific keyword in the parent table, show all records where that word appears in related tables. This is functionally equivalent - parent rows on the left, and related rows in the block area.