Paraswap won't let you swap Eth for WSTETH unless you have a huge overhead for fees.

[Zerophase]

Paraswap's gas fee calculation claims if you're swapping 10.05 Eth to WSTETH, and you have 10.059 that you do not have enough Eth for the fees. But, that's definitely more than enough Eth for covering the swap fees. You have to pull your Eth order all the way down to 10 Eth, and that's 0.059 Eth more than the amount traded. That's definitely way more than enough to cover fees.