Hi @KimberlyM ,
Do you want to display the latest Note data within your "Dashboard_Gallery" for each item in your Lead_Data List?
I have made a test on my side, please consider take a try with the following workaround:
Set the Text property of the "Last Update" Label in your "Dashboard_Gallery" to following:
First(
SortByColumns(
Filter('Lead_History', LeadID = ThisItem.ID),
"HistoryDate",
Descending
)
).Note
Note: I assume that the "Dashboard_Gallery" connects to your Main Lead_Data SP List.
Please consider take a try with above solution, then check if the issue is solved.
Best regards,