That's weird, it's working on my end. Did you make sure that the Parking Minimums checkbox is enabled, and that you clicked on the Set Garage Capacities button? The garage capacity change doesn't work automatically on load, you have to click on the button first. I might add the feature so that it sets on load now that I think about it though!I know very few assets actually have built-in underground parking but for the ones that do, if I use the dev tool to view developer info, I do not see the parking spaces increases for the assets I have that I know for sure have underground parking. I love the other features and love the idea of this one but can't seem to see the results. The ones that have underground parking never increase in space capacity, at least according to the dev info tool.
Many thanks for such an amazing mod!