Retracted columella (totally gone) 10 months post op. Can this be fixed without another revision surgery? (photos)

Your nose looks pretty good. If you were to perform aesthetic measurements on the amount of columella show you now have I think you would find that you fall into the norm. I would strongly suggest leaving your nose alone.

Yes, In a minor office procedure some of the excess tissue can be removed from the base of the columella at the level of the nasolabial angle (where the columella meets the upper lip). That will reduce the columella to more appropriate location and angle.
Best
Dr J

And you certainly do not resemble Michael Jackson! Based on your photos, you appear to have thin nasal skin and a somewhat over projected nasal tip appearance on profile. Here to have a pleasing nasal tip appearance on front view without stigmata of Rhinoplasty surgery. Since it's not clear what needs to be "fixed", please consider reviewing your concerns with your surgeon or consider procuring a copy of your operative report and Consulting with another reputable rhinoplasty specialist. Wishing you well moving forward! Sincerely, Dr Joseph