I am looking for help in Lookup Function in Powerapps. I have two galleries and I want the Text which is HB Hours to be populated with sum of another Gallery which has multiple entries of the same User Name Queue Name and date.
I just saw you filtered the wrong way round. For filtering, you've got to say PowerApps which given values shall be identical to which ones in the collection. Therefore you have to replace the label Texts, not the collection/gallery ones. Please change Text property for testing purposes to:
Please take care that there is data in the collection by looking it up in Files > Collections > CollHBData. If yes, please take a screenshot of your PDur, ShiftDate and EID column. How many items are in the Sharepoint List HBData? Please take care that Activity name and the filter string in your text property are exactly the same.
If not, just insert a button, put a ClearCollect(CollHBData,HBData) in it and press it.