I want to know if all the connectors of the laptop have intellectual property or copyright, I do not know how it would be said in this case, or only those modified by the companies for their specific products.
Apple product connectors
I assume that these connectors could not be used in any commercial product, since knowing Apple must have everything patented.
Connectors of multiple brands of laptops
In the case of the other brands, that there are multiple connector chargers, I do not know if they are owners and must be paid, or are free use.
laptop charger usb connectors
The chargers you use are either USB Type A or USB Type C, you have no problem using such connectors.
Investigating chargers that use usb type connectors, I found one that belongs to Lenovo, and I think you should own it.