Good spotting, currently in the iOS app you can't see the description when you only have one bunq.me payment for that day.
We're aware of that issue, and will get that fixed. 💪
If you have multiple payments for that day, you can see the descriptions by tapping on the group of icons at the top right (inside the bunq.me event), and choosing an individual payment.
You should always be able to search by the payment description. 🕵️♀️
Thanks again for the heads up!