[Bug] - Onchain payment send confirmation screen. Editable amount

[brh28]

Describe the bug
Fee is failing to display on the onchain payment send flow. Also, the amount field is showing a edit button when it is not editable

To Reproduce
Go through the Onchain payment send flow

1. Go to the flash-mobile home
2. Click on "Send"
3. Enter an onchain address. Click "Next"
4. Add an amount and continue to confirmation screen

Expected behavior
Confirmation screen should show transaction details, including the fee, without edits buttons

Screenshots

Smartphone (please complete the following information):

• Device: Google Pixel
• OS: Graphene

[linear]

ENG-32