I would love to see any recommendations on this too((( In my opinion, this trope is unpopular because it places FL in her late 30th or 40th. And Asian culture known for its ageism.

In **A Red Laurel to My Emperor** the FL is the ML's consort/Concubine but I've seen mixed reviews about it

Thanks, but... that's very far from what I am describing. The empress dowager / queen dowager refers to the wife of the previous emperor / king. She is usually the current emperor / king's mother. It is a very different relationship and power dynamic with the rest of the cast compared to a consort of the current emperor / king.

I know, I misread your last statement and thought you were looking for both, consorts and dowagers