[iOS] No Fiat conversion in Wallet
**Describe the bug**
The balance on XMR Wallet is not shown in EUR. Can't speek for other coins or USD. Same issue in Monero standalone app.

**To Reproduce**
Steps to reproduce the behavior:
1. e.g. Open XMR Wallet or
2. Send

**Expected behavior**
Wallet should indicate balance in XMR and EUR

**Screenshots**
If applicable, add screenshots to help explain your problem.

**Platform:**
 - OS: iOS 17.5.1
 - Device: iPhone 15 Pro
 - Cake Wallet Version: 4.17.0


**Additional context**
Add any other context about the problem here.