I'm in a similar position - a tech lead role at a Big N - and have recently been doing some interviews for senior roles at FAANG. The most frustrating thing is knowing I can't really leverage anything I've learned over the past 7 years of my career in the interview, at least at the early stages. I've been "studying" Leetcode after work for a month or so but always seem to make stupid mistakes under the time pressure of the interview. I don't want to spend my entire career at one company, but it's clear I'll need to be very lucky and/or practice much harder on my own time if I want anything like a similar position/salary elsewhere.