Ok, I answered some of those questions for myself, but raised another. Your engine is listed as D1803-CR-TE4 in a Kubota brochure which would make it very similar to an L3560 except yours has a turbo (the T in TE4). But D in the engine code typically means 3 cylinders, but your excavator is listed as 40hp with 4 cylinders.? In any case your system sounds like a newer version of an L4060, and at least it has the common rail fuel supply and an updated version of the software and display panel.
How often is it going into regen, how long does it last? Most of us with engines of that general size have the tractor regen about every 20 hrs, but we have seen a few shorter and some much longer when they are used harder. If it is going into regen seamlessly by itself, and finishes in less than 30 min, it may be fine, and you may be running it well.