If it’s locked down by the company I think you’ll be limited to what you can do but I would expect if you are going from one locked work phone to another they ought to have in place some means of doing this for you.
… is precisely why I asked.
Hoping to move across WhatsApp, photos, videos and various files.
WhatsApp should backup to itself, force a sync before you move the SIM across.
What “photos, videos and various files” do you actually need on your phone? Are they not backed up elsewhere? If not, they aren’t that important. A phone is a transient device, you’re ducked for anything important which isn’t backed up the day it falls out of your pocket.