Force USD at checkout if payment gateway is X

My payment gateway enforces that I only use USD at checkout, I use multi currency and I have different prices for each currency

USD: 200
CAD: 400 (even though it’s approx. 289.61 USD, but I want to use custom prices)

On my current settings, this currently works but it sends the values 200 USD and 400 CAD to the payment gateway respectively, however that’s not working for me as the payment gateway only works with USD, is there a way to do this with configuration, or by adding a custom function on woocommerce or CURCY hooks? Thanks

Final payment:
If user selects USD, 200 USD is sent to payment gateway
If user selects CAD, 400 CAD (289.61 USD) is sent to payment gateway