In Figma, I have a menu that should change it’s width to fit the left and right edges of the page and a cloud graphic that pins to the right edge, but when I export to Anima and try the responsive window, the menu instead sticks to the left and the cloud graphic sticks to the center.
So, one of the best ways to ensure the position of your elements are the same between Figma + Anima is by using Auto-Layout inside Figma. I am attaching a video regarding how to use it: Figma in 5: Auto Layout - YouTube
Basically, you can make sure your elements are responsive inside of Figma and that will ensure that they are also the same inside Anima!