Repair or Replace Plaster over Sheetrock/Gypsum?

I am working with some plaster over sheetrock in Queens, NY. Some of the sections of sheetrock over the years have been removed to install additional wiring, running other cables, and access for repair of various items. I posted a picture of one of the panels adjacent to a spot where sheetrock and plaster was removed as an example of how the plaster has cracked and fallen away from the ceiling. Is it possible to put up replacement boards in the spaces and re-coat those with plaster to match? I really don't want to pull the gypsum altogether becuase there is no water damage whatesoever and if there is potential to keep the plaster through repairing that would be great.

That being said, one benefit of removing the gypsum board altogehter is I get a chance to fill the joists with insulation before putting up new sheetrock. Once I do that, however, there is no way I am going have the plaster applied over the new sheetrock...way too time intensive and/or expensive.

Is there some ratio of sheetrock-without-plaster to sheetrock-with-plaster-intact that I should consider?

something i have seen done is they install plywood between the beams over the crack nail that to the beams and then screw the sheetrock to the plywood to fix the crack plaster sand and paint. you have to go up into the attic or craw space.

Thank you for the follow-up! I probably should have been more specific. This is sheetrock nailed to the ceiling joists with a skimcoat of plaster to finish the sheetrock, so there isn't a crawlspace. I cropped the original picture to emphasize the plaster that had fallen away over the years.

I just don't know if I will have the skill to apply a new skimcoat of plaster that will match what was originally put up.

if you can find the joists you could try screwing it together or cut out the broken piece and hang a new piece.