Show related records right in the Attribute Table via expanding tree

[Bud]

It would be helpful if we could view related records right in the attribute table underneath a parent record:

I'm aware that there are similar mechanisms in the attribute window/identify window. And I'm aware that it's possible to show related records via a separate/stacked section in the attribute table.

Those mechanisms work, but they have limitations. It would be better if we could explore parent/child records all within a single expanded tree right in the attribute table.

Related: Subdatasheets in MS Access