Hello, I am working on rendering an AR saved search using a SuiteLet. Is it possible to replicate the saved search's drill down option in the SuiteLet?

I do not think you can make that from the native suitescript API. you might need to create your own HTML in the suitelet but that would be from scratch or probably using any external library

Build a SPA

Do you mean the summary?

Yes the Summary @Alan Fitch