How to stretch 2 columns in a flexbox

Hi,

I have a flexbox with 2 columns. But it is now alligned to the left instead of the center.
So the left column is perfect, but I want the right column to be more alligned to the rightside. Otherwise there is a huge white space at the right side of the screen.

I tried stretch and justify content, but it didnt work.

Anyone know what to do?

https://preview.webflow.com/preview/raas-eeb0e3?utm_medium=preview_link&utm_source=designer&utm_content=raas-eeb0e3&preview=0758370d6c65772250a1d5b70586a41c&workflow=preview

Thank you Stan! Your video helped a lot