My laptop has switchable graphics ("R7 Graphics" linked to my APU which is an A12-9700P and an R7-M340 which for the record, is rebranded as an R8-M445DX). But in radeon settings the only options for switchable graphics is 'Power Saving', 'Performance' and 'based on power source'. I selected 'Performance' for a particular game but it still has the integrated "R7 Graphics" selected. Is there a way to change that?
You do not have switchable graphics.
You have hybrid crossfire graphics. That's what the term "Linked" means.