Unable to turn off iOS 18.1 Beta on my iPhone 13 Pro Max

Hi everyone, I recently purchased an iPhone 13 Pro Max, and it has 18.1 Beta (22B5045g). It has no options to turn off beta or developer updates (as I haven’t signed up to them) will I still get 18.1 RC/stable version when that releases?

Thank you in advance.

[Re-Titled by Moderator]