Externally generated posts don't have the instant sharing checked by default

[AndreeaCristinaRadacina]

Description

A user complained about the fact that posts coming from a different API still don't have the instant sharing active even if the option is set in the ROP's general settings.

I managed to replicate this using Feedzy's posts.

ref: https://secure.helpscout.net/conversation/2503737945/403597?viewId=212385

Step-by-step reproduction instructions

1. Go to ROP > Dashboard > General Settings and enable these three options:
   
   
2. Go to Posts > Add new and see if it has the instant sharing checked:
   
   
3. Go to Feedzy and create a new import using a random feed, e.g.: https://www.codeinwp.com/feed/
4. Run the import and navigate to Posts
5. Open one post created with feedzy and see if the instant sharing is checked:

Screenshots, screen recording, code snippet or Help Scout ticket

Posts from Feedzy:

Environment info

No response

Is the issue you are reporting a regression

Yes, this is a regression.