SortByColumns(
Filter(
Sessions,
'Session Number'in Filter(Registrations,
Not(Status.Value="Cancelled")).'Session Number'
|| Not('Session Number'in Registrations.'Session Number'))
,"SessionNumber",Ascending)
Thank you so much sir for quickly response and sorry for delay from my side.
i am adding my code here, about delegation warning on gallery.
SortByColumns(
Filter(
Sessions,
'Session Number'in Filter(Registrations,
Not(Status.Value="Cancelled")).'Session Number'
|| Not('Session Number'in Registrations.'Session Number'))
,"SessionNumber",Ascending)