This app was mentioned in 2 comments, with an average of 2.00 upvotes
Mainly or almost all of it is honey. On page 5 I see a bunch of pollen, but nothing unusual.
The cappings are dark yes but from what I understand that does not indicate a problem. Same with the "flatness" of the capings.
Just a quick google search here: https://beekeepingbasic.com/wet-vs-dry-capping/ Is probably your answer as to why it looks so dark.
As for specific bee & hive health I recommend this free app:
https://play.google.com/store/apps/details?id=ca.ab.gov.beehealth
It's got amazing information.
/u/kevvan just suggested to me BeeHealth, which is a beekeeping reference app.