The phrase "actually be necessary" is correct and usable in written English.
It can be used when discussing whether something is truly required or essential in a given context.
Example: "While some may argue that additional funding is needed, it may not actually be necessary for the project's success."
Alternatives: "truly be required" or "really be essential".
This is especially so because only in the worst case would a military strike actually be necessary.
So if you are thinking about the diversity of parasites, it might actually be necessary to double the diversity estimates".
"We have sought the advice of an administrator should the worst scenario actually be necessary," he said.
Although SpaceX has talked about the Raptor on a number of occasions, the details have been somewhat vague, including how many of the engines will actually be necessary to power a trip to Mars.
Perhaps leaving the drive out is the thing to do (which could be used for software or other storage), and it might not actually be necessary for video or other media.
On the other hand, a separate electrical inspection may not actually be necessary.
Energized by Anton's charge, the team worked together to define the skills, experiences, and mindsets that actually were necessary to succeed in the team.
But, of course, agencies have the power to issue enforcement regulations only in so far as the regulations actually are necessary to enforce conditions spelled out by Congress.
Because doctors can't distinguish these slow-growing, low-risk tumors from more dangerous ones, some women end up receiving surgery, chemotherapy, and radiation that might not have actually been necessary.
"Many Europeans insist that they shouldn't have to prove these techniques are detrimental to their security but, instead, that governments should have to prove these techniques actually are necessary".
They knew that the argument of "saving tens of thousands of American lives" only counted if an invasion actually was necessary.
