Definitely! The Listed On column of your Inventory shows an icon for each of the marketplaces on which your items are listed.
This allows you to view your online listing locations at a glance, and to easily spot which items are still to be listed. You can also filter your inventory by specific marketplaces.
To add the marketplace(s) on which your item is listed:
In Studio on desktop:
Go to Inventory and check the box next to the item(s), then
click Listed On and choose your marketplace(s) from the 45+ currently in the list.
If your marketplace doesn’t appear, simply type it in and click Add.
Click Save.
You can change listings for multiple items simultaneously if you wish.
OR
Open the item to see the marketplaces on which it is listed, below the title.
Click + Add Listing to add or remove marketplaces for that item.