Oddly enough, the fact that you want to work for a FAANG company might make you less attractive as a candidate, though don't let that dissuade you from applying.

Secondly, front-end development from a pure programming perspective is less stable (with the rise of AI-assisted development) than the ability to communicate with stakeholders; you may have a superpower that you are in fact under-selling.

Open-source projects are probably your best opportunity to demonstrate your skillset, with NDA-free client projects your second-best opportunity.