You can use the disableVerticalSwipes method to prevent unwanted vertical swipes and the enableVerticalSwipes method to enable them. These methods control the state of the isVerticalSwipesEnabled property in Telegram Mini Apps.
According to the Telegram Web App documentation:
If isVerticalSwipesEnabled is set to true, vertical swipes by the user will minimize the mini app. If set to false, the mini app will only be minimized when the user swipes the header.