Is this colony started from a nuc and when? The brood maybe from before you installed it. What you are showing is mature-ish capped brood (it will not be capped brood a week from now - it will have hatched, by then.)
Late-stage open brood looks pearly white glistening grubs curled up in the cells. It is easy to see. worker brood is capped about the ninth day from an egg being laid.
Eggs= three days, or less old (meaning from when queen was last alive and on the job). Seeing eggs takes experience, so don't worry if you don't see them right away.
Open larvae = four days through the ninth day from egg laying. Larvae 4-6 days from an egg are very hard to see. From 7-9 they are easy to spot. Newly hatched larvae (day 4-6) are swimming in a tiny pool of irridescent royal jelly at far end of the cell. Stored nectar, while also liquid and shiny, looks more like a drop of water.
Capped worker brood = from 9th through 21st day from egg. At first the cappings are smooth and rounded and lighter in color. Towards hatching they become a little rougher in texture, and finally on day 20, or so, they may show signs of effacement, meaning they are thinned and eventually you may see the dark head of the nearly-cooked bee.
Newly hatched bees have a slightly paler, furrier look about them.
If you have one full side of one frame (more or less) of capped brood (what your picture shows), you should expect to see about half that much area in open brood (of all stages). With perhaps (in area) about two thirds of the open brood in clearly visible late-stages (i.e. easily visible white grubs). And about 1/4 of the total area of capped brood being still in the egg stage.
This is because bees are eggs for 3 days, larvae for 6 days and pupae for 12 more days. So there are usually four times as many capped pupal cells as cells with eggs in them. Does that make sense?
Concentrate, initially, on finding late stage brood (fat white grubs curled snugly around inside their cells.). Since you have a full frame of capped brood, look on the other (inward) side of that frame. Or if this was the inward-facing surface of frame, the on the surface of the next frames inboard from it. But expect in a crowded hive, perhaps without a full complement of drawn frames, this orderly progression may not occur. Generally the seams of the brood nest with the most bees are where there is brood that must be kept warm, fed, and hatched cells being re-laid after cleaning.
Don't get frustrated, just keep looking, and one day, soon, you'll just see it and make sudden progress. Then try seeing ever-smaller creatures. Eggs look to me like tiny white rods at the back of the cells.
If you think you see eggs, mark the sides and tops of the frames to indicate the area. Look again at the marked area a week later. There should be visible larvae in those cells.
Using the timetable I wrote above, and working from the date you installed the colony, what stage brood would you expect to see that had been laid as eggs after the installation date? That will confirm that the queen was alive and well after installation. A question I often asked my students in our weekly classes: "OK, so you can see eggs - what does that tell you?" Answer: "We didn't kill the queen last week!"
ETA: the messy areas hanging below the frame are burr comb, ignore them or slice it off. The thing circled in green is likely a queen cup. Flip the frame up and use a flash light to look down into it. If it is dry (as I expect it will be) just ignore it. (Or cut it off if you want keep track of the number of them. The bees can rebuild one in hours, if they're in the mood.) The bees put it there just to scare you! Swarm queen cells are very numerous, not singletons like that. Single queen cells that happen in a supercedure are usually up higher of the face of the frame. And emergency queen cells look like grafted-on peanuts in areas of capped brood. I see none of those on this frame. Chances are all is well. Is your queen marked? She will have green dot if she was born this year (2019) or a red one if she was born last summer (2108). (Or no mark, or any other color, at all. But those colors are the "official" ones for those two years. I mark my queens to match the color of their hive boxes, so I have various pinks, baby blue and turquoise, gray, pale yellow and orange, etc.)
Nancy
