As long as leasing is available for the vehicle in question then x-plan pricing should apply. When I bought my Mustang, there were no incentives for leasing.
As long as he is still a qualifying employee and he still has x-plan pins to give, he only gets four per calendar year, then it shouldn't be a problem. There would be no need to travel, He could email you an invite and then you would be able to shop the local inventory online and see x-plan prices.
Yes it has.
https://www.at.ford.com/en/homepage/news-and-clipsheet/news/2019/11/mustang-mach-e-u-s--employee-purchase-plan-announced-.html?cid=BOC-2019-11-14