In timetable mode I only see the services between Hicksville and New York Penn. The services between Atlantic Terminal and Hempstead, that were there in TSW2020, seem to be missing when selecting the M7 https://xender.vip/.
On the Locomotive Filter screen (the screen before you view timetables, where you set weather, choose loco) hover your cursor over the loco icon (M3 or M7) and click the pink “Q” icon with the paintbrush next to it. That will open a menu that will allow you to select different consists - 6-, 8-, and 10-cars. Each consist has a different set of timetables associated with it. Hope this helps!