Can one monitor by hotspot?

If I use the hotspot of one cell phone from another for my laptop, can that person monitor in his cell phone which pages I visit and what kind of data is on my laptop?

One talks about fake networks, the other about hacking.

Do not think so awkward.

When I log in to a friend's router with my mobile phone or laptop or Wi-Fi-enabled device and this friend has enabled the log function on his router (has nothing to do with hacking, it's usually just a switch to turn on) , then the friend can look

Which pages I'm surfing on

and when I do that

and what I did on the net

He can't easily see what data you have on your laptop unless he uses the standard remote desktop connection, or he has a vnc remote protocol with you or otherwise gets access to your laptop or smartphone at some point.

that is already possible and not so difficult to set up…

Anyway, you do not need firewalls or something.

If the person who owns the phone has installed special apps that will record the traffic then he can see everything that is sent about it, even if most of it would be useless for that person as much of it is encrypted. But what he can see is with which servers you connect (can be internet pages but also eg connections of programs) as well as unencrypted data traffic. What files are on your laptop, he could only see if he would hack into your laptop

Can you do it theoretically.

In general, you can read out all packets within a network if they are not encrypted.