While you have the axle out, you will see the big end bearing is easily cleanable (for lack of a better term). It will become a routine maint. item for me to remove the hub just to clean the cavity! Not trying to be disrespectful in any way but the hub is definitely serviceable. Ducati is going to say it's not becuase they want to sell you a new unit and there is the liability issue.
https://www.ducati.ms/forums/6823769-post20.html
Talk to any tech, as I did, and they will tell you that bearing should be re-greased. For the life of me I can't find my pics to show I did it. Use a solvent that will not swell the seal, and a tooth brush or similar and clean all the old out and repack. I, for one, can not simply afford to buy a new hub when the time comes, so I will do everything in my power to make the original one last. The other bearing nearest the chain is sealed and not greasable.
It really is as simple as cleaning and regreasing a bearing...
Here's a vid to show you the process (not mine). One thing I do not recommend is pounding the hub back in with a mallet. If you have a small wedge to open the swingarm cavity a little, it'll slide in easily.
And I used anti-seize around the hub, not grease.