If you're not seeing your Alpha or CBT1 Emblem on your Hyper Universe account, you must be logging in to a different Nexon account than the one you had used for your Alpha/Beta experience.
You would have to submit a ticket to request to unlink your current Nexon account from Steam so you can log into your correct Nexon account that you had used during these playtests.
If you do unlink your current Nexon account and log in to a new account, your account progress will be reset as it's treated as an entirely new account. Fortunately, you still get access to all your Founders goodies!
The Steam Unlink process can be found here: How do I unlink my account from Steam?