https://uk.reuters.com/article/uk-ai...-idUKKCN1GC1YS

Why don't you fill in your details at https://www.euclaim.co.uk/ as they will give a preliminary opinion on whether your specific circumstances qualify for compensation or not. (You will not be the first person to claim for delays through Schiphol on that date so they will know exactly whether or not this is a covered situation).

If necessary, state that you live in the UK just to get the opinion.

I am not saying that you should use this agency to press the case for you (if, as it appears, you are a US resident they may not do so anyway) - but if, for your specific circumstances, they decide that compensation is not due, then there really is no point in pursuing a claim.