Is there a way that an ISP/mobile service provider can connect the PC/laptop someone is using with their mobile phone?

Hello, forgive me if the question is stupid, I'm a beginner. Is it possible for an ISP to make the connection which device a person owns? Perhaps through websites visited? or the kinds of things each person is streaming? Let's say person A searches for "makeup" in their laptop and phone, while person B searches for "sports" in their devices on a single network, does the ISP have some kind of data mining algorithm that can assign ownership to devices?