Thanks for the survey.  I added the 3 housenumbers to the gate and linked the museum to it.
https://www.openstreetmap.org/node/8378126231

It will not make it possible to only have "33-35" to match the official address, however. 😞

I also added "Centre de santé PSE" next to the museum, which claims to have 31-33-35 as its official address, so I don’t see any option.

But at least, on our map, the museum is located correctly.