My hotel in Beaune, the Ibis Styles, asked to see my pass sanitaire upon check in. It was not neccessary for check in but it is necessary to eat breakfast in the breakfast room. They ask at check in so they don't have to bother at breakfast.
I asked if they would accept the CDC card and she had no idea what I was talking about.
This is the first hotel of four to ask about the pass at all.