Same App with different Data

I built a minimalistic menu app that is intended for Google Maps primarily but what I cannot understand is how do I sell the same app to differents bussiness owners and show to their users the correct menu for the respective restaurant/coffe shop.

Every time I make a sell, they have to copy my app, thus having a independent spreadsheet?

You could have one app only and onboard different businesses. I feel this is more complicated to maintain, you take the risk of getting data mixed up and you might run into data limit issues.

You could copy your original app and “sell” it to different businesses.

You could submit your app as a template to Glide’s template store and sell your template to businesses. On top, you could sell customization of your template, as well as ongoing maintenance and feature development.