Does Buy Items honors Lead times

We are using Supply Availability Search as ATP Rule.

The scenario has been executed for a Make and Buy Item, where no Actual On Hand and Incoming supply is available.

We can find GOP is using Fixed, Variable & Preprocessing Lead times for scheduling Make Item.

For Buy Items, GOP schedules based on horizon date at Profile Option 'MSP_GOP_HORIZON_DAYS'

Is there any provision to leverage any Lead time (Fixed, Variable, Pre Processing, Post processing etc.) can be used for scheduling Buy Item in Supply Chain availability search.