Apparently, if I’m using <html dir="rtl"> then the side=“start” is being respected, but using "direction: rtl" in the scss file causes the side=“start” to not be respected by the app.
However, it seems like there are MANY issues with RTL support… (for example, the Back button arrow doesn’t change directions, the Details arrow doesn’t change directions… I’m not complaining, but I wish I knew this before starting making the app in Ionic.)