For example, is the 23 gwei on the screenshot?
I did try checking out via wallet connect today and was shocked to find out that despite ETH fees being low (20 gwei ~$1) the estimate for the deposit ~$5.4 via the bridge
Edit:
Metamask can let you edit the transaction fees to the lowest, but the problem is that the bridge uses a very high gas limit for Eth transactions - 94,491. As far as I know the normal gas limit for ETH (not ERC20 tokens) is 21,000
So fees could be even higher for ERC20 tokens.