I am based in Europe and every single Hilton or DoubleTree I stayed in during the last few years in Europe or Middle East allowed for digital check in - however, in some cases it was not possible to request a digital key and I was advised I had to stop by the reception. However, in no case could I digitally check out ... That being said, I just spent a few weeks in Hilton La Romana in December and no digital services were available at all.