The goal isn't to supplant Linux as a commodity kernel, but instead as a microkernel for integrated mobile devices. E.g., as a platform OS, not a general one.
So the short answer is "no, unless you use one of Google's hypothetical future post-Android devices".
Any idea of that part was killed several years back, ensuing brain drain combined with firings makes it sort of a non-sequitor to even wonder. It is on life support already, and an obvious target for more Efficiencies™ should the 2020s turn rougher.
I'm not sure how you came to this conclusion, but that's not true. Well neither narratives are rather. There is no reason to believe fuchsia doesn't have a future anywhere Linux currently runs, but also, the goal isn't necessarily to supplant Linux.
For those who are confused about this statement, like me, Google started bringing Chrome/Chromium support to Fuchsia a few years ago. But, earlier this year, they officially cancelled those plans: https://9to5google.com/2024/01/15/google-is-no-longer-bringi...
It's worse than that - imagine if you had a team focused on a pie in the sky AI-based UI that ran on Fuchsia, but over-funded that, and it went nowhere, so it was killed, and then all of a sudden an LLM came out and all the miraculous UI parts seemed possible, but you were stuck with poorly run Android?
So the short answer is "no, unless you use one of Google's hypothetical future post-Android devices".