ATP XC time does not require a landing but does require you log 50nm.
So that means a waypoint or airway intersection or lat/long.

Example:
As CFII you take an instrument student to practice an approach at an airport which is 40nm away bit the IAF is 50nm away, yoo can log this as XC for the ATP

For the Civil Air Patrol you participate in a SAR for a missing boater.
Log the lat/long of your furthest grid point.

And so on.

Find a training buddy and fly everything under the hood.
Go just far enough that it qualifies as XC and practice approaches approaches and approaches till you can fly them with zero deflection.