ETH balance should be aligned to the right, just like it is on desktop.

Note you have to select a token first to have both ETH and ERC-20 balances displayed.

<img width="383" alt="Screenshot 2023-06-21 at 21 10 11" src="https://github.com/OffchainLabs/arbitrum-token-bridge/assets/47932951/ef0dc8f9-8956-422e-8ffa-a5410c1b8a23">