If you used a third party software like cnc.js yes. Otherwise the only way I can think to do it would be to disable Z steppers and physically set it. But it would be extremely unreliable. Maybe another way, Ryan and others that have come from the LR2 may know a way
Can I ask why you currently don’t have a touch plate? A touch plate in its simplest form is a piece of conductive metal that has a uniform thickness. Mine I used a cheap china wrench from a 3d printer part