Note that use of site events page is strongly discouraged though.

I'm not sure what you mean by achievements, but if you want to see where all your honor came from (which includes achievements), you can go to https://www.codewars.com/users/YOUR_USERNAME/site-events. Replace YOUR_USERNAME with your actual username.

Documentation is still work in progress, but you can find some details here: https://docs.codewars.com/references/gamification/honor/

Did you find an answer to this? I was looking too and having no luck.

You can get honor from many ways including achievments. But is there a way to check what the Achievments are?

I feel like there should be more clan features as all you can do is see eachothers stats, im not sure how you would implement this though.

In user settings you can write your clan name, when there are two or more people with the same clan name they will automatically be put in the clan, you can see their stats ect