Broken CMS Support for Responsive Images (No srcset)

My bad - in my use case I need thumbnails/optimized images for my front page, with the full size images in my articles. Instead of just using the same image and relying on the (non-existant) Webflow responsive image thingy, I need to take the image, resize it and have a separate image field for it - which I thenk use on my front page. Inside the article the full size image is used. It’s horribly inefficient.