when i want to export my video the maximum frame rate that I can choose is always 30fps, while my 4K videos are always 60fps. I'm using Davinci Resolve Studio 19. How can I solve this?
You need to set the frame rate in the project settings or in individual timelines before adding media to the timeline. You can't change the frame rate once media has been added.
Also, the setting for frame rate on the deliver page is for special cases only, if your timeline frame rate is 23.976 or 24.