It's important to know that KovaaK's search only works on usernames, and your username is different from your Steam display name! User you're searching for must be registered on kovaaks.com, and you should type their KovaaK's username in search.

If you're looking for your own profile, the best way to access it is to link your KovaaK's account to your Discord account in KovaaK's settings, and then to sign in with Discord on the Voltaic App. This way your KovaaK's profile will automatically show up on your app's profile page, and will stay synced regardless of the username.