My oath was on 2nd June too. Have you received the confirmation email? I haven't yet.
My tracker just changed to 'completed' for the 'citizenship ceremony'.
UPDATE AFTER CALLING IRCC @ 8 AM - I was told they did receive my signed oath form email, and updated it on my file on the 3rd. I'm guessing this lead to the 3rd June tracker update: 'citizenship ceremony - completed'. My citizenship certificate is in queue for printing now. Receiving the confirmation email depends on the agent handling the case, and how busy they are.
I'm relieved now. Hope this helps you too