How many questions is too many?

So i’m starting to set up my first few surveys in Typeform and, luckily, stakeholders have sent through a lot of questions to ask our users.
I was wondering though, has anyone recorded the completion rate of their surveys over time and split it by question count or even survey duration?

I was hoping to get a sense of the maximum recommended question count or ideally a completion rate curve by question count/survey duration. I’ll be collecting this data myself over time and i’m happy to share once I can.