This is a good, well focused, photograph. Thank you for posting it.
The pattern of egg laying is interesting, with many adjacent cells each having an egg. There are also cells which do not have eggs (or perhaps I did not recognise?), but these empty cells are close to the cells with pollen.
Do nurse bees, (or any other bees) retreat into these empty cells? Or is there some reason why the queen might not have laid eggs into them? The fact that there are many cells with eggs, and no gaps, suggests that the queen was thorough in checking each cell