Power Platform Community Forum Thread Details

I have a parent/child gallery in my PowerApps and I have in the child gallery Agenda items.

I would like to show in my agenda the two people who are presenting the Team Activity.

Filter(
    ForAll(
        SortByColumns(
            Filter(
                'All Hands Meeting Pages',
                MasterID = ThisItem.ID
            ),
            "PageOrder",
            SortOrder.Ascending
        ) As p,
        {
            ColumnName: p.PageName,
            ColumnValue: Switch(
                p.PageName,
                "Cover Sheet", "Cover Sheet",
                "Agenda", "Agenda",
                "Opening Remarks", ThisItem.'Presenter Opening Remarks'.DisplayName,
                "Remarks", ThisItem.'Presenter BZ_Remarks'.DisplayName,
                "Hails", ThisItem.'Presenter Hails_Farewells'.DisplayName,
                "Farewells", ThisItem.'Presenter Hails_Farewells'.DisplayName,
                "Team Activity", Concat(ThisItem.'Presenter1 Team Activity', DisplayName, " & "),
                ThisItem.'Backup Page 1 Title', ThisItem.'Backup Page 1 Presenter'.DisplayName,
                ThisItem.'Backup Page 2 Title', ThisItem.'Backup Page 2 Presenter'.DisplayName,
                ThisItem.'Backup Page 3 Title', ThisItem.'Backup Page 3 Presenter'.DisplayName,
                ThisItem.'Backup Page 4 Title', ThisItem.'Backup Page 4 Presenter',
                "Presenter Other", ThisItem.'Presenter Other'.DisplayName,
                "Remarks-Front Office", "Remarks-Front Office",
                "Remarks-IT Ops", "Remarks-IT Ops",
                "Remarks-Digital Innovation & Data", "Remarks-Digital Innovation & Data",
                "Remarks-IT PfM", "Remarks-IT PfM",
                "Remarks-CISO", "Remarks-CISO",
                "Remarks-Other Support Function", "Remarks-Other Support Function",
                "Employee Spotlight", "Employee Spotlight",
                "Personal Information", "Personal Information",
                "Education and Experience", "Education and Experience",
                "Family and Fun", "Family and Fun",
                ""
            ),
            PageOrder: p.PageOrder
        }
    ),
    Not(IsBlank(ColumnValue))
)

However the code I am using while it should work is not working

 "Team Activity", Concat(ThisItem.'Presenter1 Team Activity', DisplayName, " & ") which is why I am here.  I show both people in my SharePoint list but it only displaying one person in the gallery.