I’ve ran into this annoyance as well and have had to use complex BAQ’s to determine the proper mfg lead time and use the Manual Lead Time instead.
I’ve created an Epicor Idea that anyone can vote up if they are looking for Move Time & Queue Time options to include them in the Mfg Lead Time Calculation:
Add Site Options to Include Move Time & Queue | Epicor Kinetic Ideas (aha.io)