Multiple Table Single Form

[RajatAmbi]

I have a Google Sheet which has 3 tabs in it (Customer, Subscription, Operation). I have Primary Key-Foreign Key reference in all the 3 TABS.
I need to have a single form in the App, where when I create a Customer, I get fields of Subscription Tab as well. And the same for Operations Form, I need fields from both Customer Tab and Subscription Tab.
There are many tutorial on youtube , but all of them are of Older versions, and now those option aren’t there in AppSheet.