For instance, in a sentence such as this:
Joe Biden headed for the White House on Monday for a meeting with Kamala Harris.
What would the correct form be — Joe Biden was headed or Joe Biden headed?
Joe Biden headed towards the White House...
This is the past tense. You use it to describe an action that occurred in the past.
Joe Biden is headed towards the White House
This is the passive voice in the present tense. It means the same as
Someone heads Joe Biden towards the White House
Joe Biden was headed towards the White House
This is the passive voice in the past tense. It means
Someone headed Joe Biden towards the White House.
Note, the passive voice forms mean that someone did it to Joe Biden,
This is journalistic style; it allows for the omission of the help verb in titles.
(MacMillan) be heading/headed for somethingbe heading/headed for something
if you are heading or headed for something, it is likely to happen to you soon
• It appears that the rebels are heading for victory.
As a title in a newspaper this sentence means that Joe Biden will go to the White House on the coming Monday so as to meet with Kamala Harris (on that same day).