I believe that if you find the value of $BOB in your fiat currency isn't showing correctly, it's only happening on iOS there are no issues on Android.
The solution is to immediately update your Binance app from the App Store. However, if you're still experiencing the same issue with your BOB after updating, I recommend submitting a support ticket to Binance.
dont worry It's not a big deal just a minor bug.
It will likely be resolved soon by Binance tech team.