When I visited Normandy a few years ago, I visited the American cemetery.
I did not know until I saw it, but there is a very impressive cemetery nearby for the German soldiers who fell, still very well maintained, though I suspect it doesn’t get many visitors.
If you drive through the rural areas of eastern France you will find literally hundreds of British, French, and German WW1 cemeteries. There are also 3 US cemeteries from WW1. I visited one and asked the caretaker if anything happened to the US cemeteries during the German occupation of France in WW2. He said no, they pretty much left the cemeteries alone and the French continued to maintain them.