Yes it’s possible, you can create 2 or 3 apps all pointing the the same google sheet. It’s also possible to build it all into one app depending on how you design it.
Perfect. But I don’t want my client to know that I am using this service. I just want my client to have the admin app and nothing else. That is, through it he can add products to the store and that it is reflected in the application of the clients of his business. In addition to receiving orders from your customers in the admin application. This is possible?
Here’s a good place to get started with the basics.
There have been several food related apps created over the past few weeks. If you search through the forum you might find something that’s similar to what your want. Some are even able to be copied. Also check out the templates in the glide builder.