How to have a app give access to other employees to view data?

Is there a way to have a app add users to a list that then have access to the same data?

Yes. First, make sure there is a relationship between users and the collection you want to add the users to.

Then, create a list of Users with a filter where relationship list item = empty.

Add a countdown timer inside the list. Create a list from this countdown timer of the list collection you wish to add.

So you’ll have a list of users that contains a list of the other collection that contains a countdown timer.

Set the timer to 1 second. Set the timer finished action to update current collection > add current user.