Necessary and useful are two vastly different things. My state is throwing expired vaccine into the garbage. I'd take a booster even if it only made me five percent safer.
I think this is a bad idea, to make this booster decision on your own. Talk to your doctor first.
The COVID vaccines have essentially a 6-month shelf life before they are considered expired [1]. So if the example doses above were delivered several months ago, the period for collecting and transporting them to another country is pretty small.
Instead of throwing away this unused vaccine, it could be given to people who are willing to participate in a booster study or would like to have it, without making the booster mandatory. Obviously a mandate wouldn't work for the excess supply sitting around.
[1]https://www.nbcdfw.com/news/national-international/unused-co...