That was the promise with the original Rift, not the Quest. The Quest2 required a Facebook account from day one and never worked with an Oculus account, unlike Quest1. They relaxed the requirement in 2022 to only require a Meta account and converted all old accounts to Meta accounts later on (and if you didn't login to 'ok' that change they deleted your account completely including all the games).

If you created the account early in the Quest2's life, or hit the wrong button in the UI, your Meta account will end up linked to your Facebook account.

You might be able to unlink the Facebook account from your Meta account at https://accountscenter.meta.com/accounts, though I don't know if you can still reach the page.