I do see that page referencing their app, so it could go either way, depending on whether their app is a mandatory part of the pathway.

It looks like you can control it with vanilla Orcaslicer. See the last post in this Snapmaker forum thread, for instance. It may or may not be willing to take gcode through the USB port—the specs indicate it has one.

It looks to me like they’re continuing in their usual direction of fairly open software on mostly proprietary hardware.