can I safely use my apple power adapter extension that came with my 2012 15" MBP, with my new 2019 16" MBP

Hello. Anyone know the definitive answer to this, as I keep hearing different things

My case scenario is this:

• My 2012 MBP 15" had a MagSafe charging cable - consisting of the MagSafe connecter and power cable going into the white square power box
• and then It came with a cable with a power plug on it that attached to the white box (i just had to slide off the power plug already on the white box)

BUT my new 16" MBP has

• just the USB-C charge cable that plugs into the white box, and just the power plug attached to the white box. This is removable.
• And this makes the connection to my new food regime

But does anyone know if I can then safely use that old power extension from my 2012 MBP.?