After delay disabled while prototyping

hi all,
i have created walk through screens with GIF. while exporting those things like images… it is just like showing as an image. how can i achieve the same GIF file format after exporting the image??? and i am having 14 screens…while doing prototyping the after delay option is disabled. i don’t know what is happening. kindly share your comments.

I have the same issue. @Figma_Support