By default a coach can be booked on all courts. You can limit them to specific courts on the Courts tab.
How to choose courts
Go to Play → Private Coaching and click the coach.
Open the Courts tab and click Edit.
Turn off All courts.
Select the courts the coach can use.
Click Save.
Good to know
A lesson slot only shows to players when one of the coach's courts is free, including your club's minimum gap between bookings.
Useful if a coach only teaches one sport, for example padel courts only.