Export video in 4K resolution

I am using X3. When I am trying to export reframed video using insta360 studio ver 2023, it is limited to max 1920 x 1080. But, i watched some are able to export to 4K using insta360 studio. Would like to check with you, how do you export 4K using insta360 studio ? Are there any settings that needed to set ?

Thank you.