PowerApps: Convert multi-value person columns into collection? Split/Collect?

Question

Is there a method to take the contents of multiple multi-value person columns from SharePoint and convert it to one collection of individual values (one record per person) in PowerApps?

I believe I can leverage Split and Collect to achieve this, but am having trouble with the exact syntax to follow. Or does PowerApps automatically convert these columns to a table anyways and I'm overthinking it?

For testing, I have a form showing 3 multi-value person columns I want to pull info from and combine into a collection. On clicking a button the action below is taken and results are shown in a gallery whose datasource is this collection.

ClearCollect(Participants, 
{Name: Value(Approver_DataCard1.DisplayName)}, 
{Name: Value(Reviewers_DataCard1.DisplayName)}, 
{Name: Value(Informed_DataCard1.DisplayName)})

So far, no luck. It creates 3 blank records. Even if it did work am not sure how I would pull additional user information; email, organization, etc.

Answer 1

I've just managed to implement your example. Check it out:

OnSelect property of the Collect button:

Clear(Participants); 
Collect(Participants,DataCardValue19.SelectedItems);
Collect(Participants,DataCardValue20.SelectedItems)

Note: DataCardValue19 and DataCardValue20 correspond ot the "Reviewers" and "Informed" multiselect user pickers.

Items property of the ListBox:

Participants.DisplayName