What is AE? Meta has a program for their top ~1% or so (who knows really) where they dump a pile of RSUs on your head, "additional equity", to retain you and bet on your future at the company. For most it's 2-4x your annual stock refresher, though I don't know exactly how it varies.
If you're E7+, this is another 1M+ stock grant on a 4 year vest on top of your 600k+ refresher grant. Stock is up from their internal refresher pricing. Their "A players" all just got ~5% bump on their 1.5M+ RSU grant.
G and other FAANG struggle to compete with Meta on comp for the actual A players. We'll see if they budgeted enough for AE to keep the people that matter.