The EU Passenger Locator Form is just that - European.
The French Government site says you “may be required to complete” the form of arriving by air which is wonderfully vague.
My visitor-from-the-uk arrived last Friday. She completed the EUPLF online and passed through French airport customs in no time. Other people were being questioned at length about their plans, accommodation etc. It could be a coincidence, but as the online form takes less than a minute to complete, why not just do it?