But can I get another app to open only showing rows in another table that share the unique id of the row in the first app so that my grandfather table is in a different app to my parent and child tables. I know it’s not possible to filter with LINKTOFILTEREDVIEW.
I thought I saw a post by you saying that the FILTER won’t work when opening a new app - it only works to view in the current app.
I have a workaround where there is another table that uses UNIQUE() in googlsheets to create a list of Grandparent UNIQUE IDs from the order table. The fist app links to it’s corresponding row in the new one (which just has name and UNIQUE ID) from where related orders and order details can be accessed.
To do what you want, my first thought is to have another table shared between the apps that contains enough information to configure a slice in the new app that includes what you want. The action in the old app would then become one of type Grouped: execute a sequence of actions that first populates this new shared table then navigates to the new app.