Dropdown List with filtering

Hi again
This time i try a dropdown list based of some filtering. I added all information to the coda test table:

If I’ve understood you correctly, you want all “Auftrag” + pictured “Inventar” rows and get from these rows “Artikel” column, right?

So, the formula to filter will be something like (not tested):

ListCombine(Auftrag.Artikel, Inventar.Filter(Bild.IsNotBlank()).Artikel)