I have no idea what to do. I've uninstalled it, re-installed it, and checked for conflicts with the 50/50 method, I don't know what's wrong! I can't configure controls in general, and searching for dragon eggs or other items, if they exist, does not work, only for the fire dragon egg. I'm confused, and can't fix this. Also, if this is not where you report bugs, I'm so sorry, if someone pointed me in the right direction, I'd be thrilled. Thank you!

The dragon eggs not appearing is a minor "issue" that's been around for awhile now, and it's due to how the mod is structured and how vanilla handles it. Since dragons are based around using json data, the items (like the eggs) need to adapt to that. So they are customized to work with it. Vanilla isn't fully equipped to work well with systems like this just yet and so things aren't perfect, which is why you aren't able to find the breed eggs in the search. They can be found in the spawn eggs tab in creative.

You can only control dragons with saddles, and the controls can be configured in the game settings. Note that they don't have their own seperate section and are inserted in the games already made control categories.