I also have iOS App version 4.33.5. I can't explain the reference on Tesla website to version 4.5.1, but I am able to see charge stats for my car. For me, this is where I find it:
Under products, select your car. Then scroll down below where you see controls, etc., and I see an entry Charge Stats. This shows up for me right below Security & Drivers and right before Upgrades. Click on Charge Stats and you should see bar graph for past 31 days with option to look at last year.
If you're wanting to see your history with all the details for your supercharging sessions (date, location, kW add, cost, etc), then you need to click on the three horizontal line icon in the very top right corner. That should take you to page with your account name, and below that you will see entry for Charging. That takes you to screen where you have option to manage your payment method, but below that you'll see a link for History. Click on the History link and it will take you to a listing of your sessions.
Hope some of that helps.