It wouldn’t matter if Germany asked for vaccine priority for providing $440M, just like what US and UK did. EU is extremely inefficient compared to how much money it’s spending for the pandemic.
Israel got priority by being 'just right' sized with an efficient healthcare system and being able to demonstrate the ability to organise a mass vaccination as quickly as possible. As such they acted as a very large scale test of what we can expect as the number of people vaccinated increases.
I don't think this is particularly to the detriment of Germany. Wasn't Israel vaccinating people before Germany had approved any vaccination?