Good day and welcome!
A few things, but first. If you’re asking about linking web pages, it is currently “broken” and you are unable to add “.com” links into your nomination. See https://community.wayfarer.nianticlabs.com/t/unable-to-add-a-link-to-the-eligibility-criteria-in-supporting-info/20512
https://wayfarer.nianticlabs.com/new/
From there, you can go to your “contributions” and edit anything currently “in queue.” You should have at least 24 hours after making a submission to edit the text as needed. I suggest placing a nomination “on hold” if you need a few more days.
Neither of these immediately sound like they meet eligibility. To be considered as a Wayspot (and PokéStop), a candidate must be a great place to socialize, exercise, or explore. It’s possible the Tesco was incorrectly approved, and that causes confusion for future submitters in situations like yours.
We all seek to enjoy the game, and the best way to do so is encouraging eligible Wayspots to promote local culture and discovery.