Yeah - I do find it odd when people say Facebook is dying, because it really isn't. Unless Zuckerberg pulls a Musk anytime soon, it isn't going anywhere - unlike Xitter, Facebook is an advertising juggernaught that makes more than enough money to keep itself afloat.
And that's not even mentioning Facebook groups, news pages, business pages, the market place, etc.. they've got fingers in many different pies, and it shows.
And even more, while it may not be popular amongst tech savvy folks, it is still insanely popular amongst regular folks. I for one can vouch that a significant proportion of my non-techy friends use either it or Instagram as their primary social media.
Hell, that's why messenger is up there too - everyone has Facebook, so everyone has messenger, making it extremely convenient to message people you know. It's certainly why I use it a lot, it's where my friends are.
Meta dominates social media even now - just look at your list. Of the top seven, over half of them are Meta.