a few more suggestions, less basic but all currently available on other invision apps so should be doable
and some that in 2021 should imo be part of the feature already
3. custom (proper) fields - so can add upcs, brand, color, condition etc etc to each item listing
4. Product image thumbnails generated - I paid for a plugin to do such but would be better if it was an invision feature
5. Tags feature - opens up all sorts of listings
6. Comments options added to the product items
7. Select amount of items per page
more later