Our Publicize feature works for any Administrator, Editor, or Author user roles once it is set up on your site.
When you connect a social media account to Publicize, you’ll want to make sure to be an Administrator for that social media account / page and that you’re logged on as the Administrator that has connected to Jetpack in order to make sure you have the fullest access possible.
Once you do, you should be able to publish posts and have them automatically share.
We have a full guide on Publicize here for you:
https://jetpack.com/support/publicize/
It’s possible that the catalogue / stores that you’re talking about might be custom post types that don’t automatically get shared, so you might want to look under the “How to use Publicize with your Custom Post Types” item near the bottom of that page for more info on how to include them if you’re wanting to publish items that aren’t typical posts.
Just to reiterate, we are not able to share items to Instagram through Publicize due to rules Instagram has enforced on publishing to their platform.
Please let us know if you have any other questions!