Any recommendations for motion sensor lights?

Depends on use case… if it’s a single source then halonix one does the job… if you need it for entire room unit then better go for the standalone sensor.. schneider electric works like charm

Looking for stairs and bathrooms only.

I use this: https://www.amazon.in/gp/product/B076STT7NQ/ You can turn any light into a motion sensing light with it.