More vulnerable, probably yes. Phones are very locked down and secured (unless you root or install custom firmware).

But, they are still worse for privacy due to how they’re used. The phone (and thus Google and Apple and Facebook and others) has access to your location all the time - your computer doesn’t. The computer is only vulnerable when on - the phone is always on.

The threats are different and from different sources. Random hackers mining shitcoins on your computer, big companies knowing what you’re doing when you carry your phone.