Is there still the possibility that the Minecraft ps3 Edition will be updated?

Or is the game too old?

Don't think so

The 1.84 is from April 2020 and the 1.83 from March 2019

So there's a possibility… But I would rather say no, since the PS5 already exists and at some point a manufacturer has to draw a line under the support for older generations

The game is not too old, there's a lot of play, but the PS3 is too old so there will be no more updates