I'm working with a SharePoint list (Named: SampleData2) containing 20,000 rows of data.
One column within the list is a single line of text column named 'Plant Name'.
I have a gallery within the PowerApp which is looking at the SharePoint list and carrying out a filter to return 1 x 'Plant Name' (in this example 'Berlin'.
This works fine.
Items: Filter(SampleData2,
'Plant Name' = "Berlin")
However, when I add a second filter criteria (to return both "Berlin" and "Stockholm") I then get a delegation warning and the blue underline of "Stockholm".

So I gather you cannot filter on more than one criteria without stumbling into the delegation issue. Can anyone think of a workaround regarding this please?