Hi Jürgen,
brilliant – thank you. I took the Fob out of the SmartLock and then created the IFTTT routine which “opens” the SmartLock-Door (not just unlocks it) if the Opener is triggered by a certain Fob.
My little daughter tried it out and then proudly said: “Wooowwww! Such a little thing can bring so much joy.”
EDIT: Sorry for (mis)using this forum for questions like this one. Ayse told me on the phone before my system purchase that my scenario with a Fob for both Opener and SmartLock would work with a 1-click vs. 2-click routine. And she also told me to go to the developer forum for questions like this one. Is there any other user-forum?