First, your salary is absolutely ridiculous. I know hard working people who have built their own businesses with blood and sweat, and they still don't make as much as a slacker engineer at FAANG. So I'd say try not to take it for granted - you will find it difficult to even make a fraction of your comp if you leave FAANG.
Second, in my experience working with ex-FAANG - these engineers, while they all tend to be very smart, tend to be borderline junior engineers in the real world. They simply don't know how to build or operate something without the luxury of the mature tooling that exists at FAANG. You may be in for a reality shock when you leave the FAANG bubble. On the other hand it could be a great challenge if you're bored, and will broaden your engineering experience greatly.
If I was in your position, I'd look into FIRE and then you can just relax and do whatever you want without worrying about finances.