Passwords, email, deleting your account, and reporting or blocking a member.
You can't change your password or email from Settings today. The workaround for your password is signing out and using Forgot Password, and email can't be changed at all right now.
On desktop, you can report or block another member from the Account/Subscription page, whether or not you've ever connected with them. This isn't yet available on mobile.
You can permanently delete your account from the Danger Zone in Account settings. It can't be undone, so look carefully for the smaller link that actually deletes it.