Hey there, I’ve changed the category from ‘Ask the community’ to ‘Share an Idea’ so others can leave their feedback and vote for this feature request. Please upvote your post.
They just haven’t built the feature yet. Other tools like Framer and Webflow have it because they use real CSS gradients, but Figma’s rendering engine is entirely custom from scratch so they have to build all of these features from nothing so stuff like this gets low priority to build.