When a post is ready to post to X or Instagram, the email now explains that the platform does not allow Magpie to post automatically, lists the steps for posting from your phone and from a computer, and has a Post to button for each account. Choosing Now under Publish sends the same email, so you can post from your phone, for example an Instagram story, after scheduling on a computer.
The posting page now opens with How to post it: numbered steps for your platform and device, above the button they lead to. If you open a Magpie page while signed out, signing in now takes you to that page instead of the Dashboard.