How to remove a top bar in top tap navigator

how to remove this top bar

That is where your nav buttons will be. If you don’t want the bar, don’t use the navigator I’d imagine?

Are you attempting to add a button to the navigator?

No,but this projest doesn’t have it.
https://x.thunkable.com/projectPage/5c183d7c7bd8616f60c5a39a