Looks like KLM have made some changes for November and December.
From 26th October to 22nd November Amsterdam will be 6 weekly with a 17.25 departure. No flights on Saturday.
From 23rd November to 4th January the route will be 14 weekly with a 10.15 and 17.25 departure. Of course this subject to change.
My own personal opinion is that I doubt we'll see the nightstopping aircraft until the start of Summer 2021. At the moment it's supposed to resume in January.