I have a doubt if it is possible to charge the air3 batteries or hub with the charger of my MacBook Pro that is 67w and have pd protocol i think

Yes,  the lower the wattage just means it will charge slower.  

Hi there. Thank you for reaching out. DJI Air 3 uses the commonly available USB-C port for charging. You can directly use chargers with this type of port, such as those used for Android devices or Mac. Please rest assured that it will not damage your battery. You may refer to the information below.

1. When charging the battery with the battery mounted on the DJI Air 3 aircraft, if using a third-party charger, it is recommended to use a 65W fast charger that supports PD3.0 protocol.

2. When charging the battery using the DJI Air 3 battery charging hub, if using a third-party charger, it is recommended to use a 100W fast charger that supports PD3.0/PPS protocol.

Thought about using 140w one, but my go to is still the dji one

I have read this thread and note that it relates to the Air 3.  Does the same approach work with the original Mavic Air (model U11X)?