It would be super helpful to be able to see search volume for each keyword based of location
YES! Upvote x100. In the Rank Tracker view, please provide metrics at the local level when you add keywords with location rankings. It throws you off and get's you excited but it's not relevant. Unless I am unaware, you have to use other tools like Keyword Planner to understand the local volume for keywords and dig into your analytics tool GA or Adobe Analytics for organic entry into these ranking pages. Si Quan Ong, yes. At the local level.
Do you mean on a local level?
@Si Quan Ong: Si Quan Ong, yes. At the local level.