I can able to create Gallery inside a Gallery, but I am not able to create 3 levels of galleries. How can i approach it ? Whenver I tried to insert a gallery inside a gallery 2, its reflecting into Active Screen.
Currently this is not possible - galleries can only be nested 2-deep (please create a new feature request in the PowerApps Ideas board with this scenario).
Could you describe the scenario in which you want to use a 3rd-level nested gallery? When this decision was being made the idea was that the majority of the scenarios would not need the third level. For example, one can have a vertical (scrolling) gallery with a horizontal (scrolling) gallery inside, but once a third level was added, if we had the need for scrolling it would be confusing for the user if we had multiple cells that could scroll to the same direction.
My use case for this is that we have a complex PowerApp that shows a gallery of a variable number of transactions to be processed, and each transaction can have a variable number of line items to enter, and each line item can have a variable number of "batch split" line items where a particular batch of material could be split amongst multiple warehouses. The third level of gallery would only show if a "Split" toggle were actviated on a particular line item in the second level gallery so it shouldn't be too confusing for the user visually since the third level gallery will only show up intermittently. My current workaround for this is to create a popup screen where a gallery will appear and allow the user to enter the split batch data there. However, this is not as intuitive and does not flow as well as a third-level gallery.
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