How do I log in to Minecraft Preview?

That's the problem. No matter how many times I go to the insider hub, it doesn't show the option unenroll from the Minecraft Preview. The option to do that is gone.

The migration process has ended on 19 September 2023. If you forgot to migrate your Mojang account to a Microsoft account, you will not be able to sign in.

However, if you already migrated your account, you can't re-migrate it to a different Microsoft account.

Reference link:
https://www.minecraft.net/article/account-migration-last-call

okay, but I didn’t use Skype or the number, since it wasn’t necessary, maybe just restore my Minecraft account so that I can link it to another Microsoft account, otherwise I feel sorry for the money, consider it a lost account. I have all the proof, emails and passwords to prove I have a licensed account.

If you don't remember the email, you can always use a previously linked phone number or Skype username to submit the account recovery form.

It is important to mention that Microsoft is not capable of telling you what's the email address associated with the Microsoft account you want to recover.

yes, but I don’t remember which specific Microsoft account I used, because when I rebooted Windows by mistake, I forgot Microsoft, since before that I didn’t attach any importance to it, I would just like to know his email, and then I’ll definitely be able to understand what is my account (I have a lot of mail)