can I connect macbook m3 pro with hub via magsafe?

Generally speaking, no, that is not a viable solution.

More information is needed to provide specific advice.

what peripherals and displays (make&model) are you connecting through exactly what make&model Hub?

The MagSafe 3 port is only for charging.

If you want to connect a hub or dock, you will need to do that using one of the multi-purpose USB-C / Thunderbolt ports.