Facebook App Review?

[threehappypenguins]

I have everything set up and can successfully post to my Facebook page from Postiz. However, I was wondering about Facebook's Development vs Live App Mode. From Facebook:

In Development mode, your app can only request data from users with an app role. To request end user data, your app must have Advanced Access permissions and be set to Live mode.

I already took care of the permissions for Facebook, requesting access, like this page stated. But these permissions are all "Advanced Access" permissions.

Can I continue to use the app for just myself, and keep it in Development mode? I don't need other users using it. I'm just not sure if the permissions are only temporary, and if I'll lose access to them after a period of time if I don't submit the app for Review. The entire Facebook process for getting this all working is extremely unintuitive, especially for private app use.