The Teamgo Kiosk app has its own "sleep" mode built into the settings of the app. You can leave this on depending how you want to use the Teamgo kiosk, but in general it's best you disable it.
If you wish to disable the auto-lock on the default iPad settings follow the instructions below. This guide was written for iOS version 13.x
How to disable auto-lock.
Go to Settings app on your iPad
Navigate to Display & Brightness
Disable Auto-Lock, set this to Never
This will ensure your iPad never goes to sleep or locks while in operation. Please also consider using GUIDED ACCESS mode to lock your iPad to the Teamgo Kiosk app when it's in use.
For more information get in touch with your support team.