Haven't stepped on a plane in over 4 years mostly due to COVID, and let an embarrassingly-large amount of miles expire. Contacted FB by e-mail recently and got this reply
As an one time exception to the rule, I am delighted to inform you that all your expired Miles can be reinstated.
The only thing you must do, is to take an eligible flight with AIR FRANCE, KLM, Kenya Airways or any other programme partner airline before
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Last time I flew, the qualifying airlines had to be Sky Team but does any airline that earns XP count (thinking of a WS flight)? No ST airline flies to my region after DL dropped service 4 years ago and getting to the other ST-served airports is a big of a chore (we're insular).