What would happen to my Minecraft account if I deleted the Microsoft account assigned to it?

If I understood your situation correctly, your Microsoft account doesn't own Minecraft anymore and there's no way to "recover" it since your purchase is linked to another account. Sorry about this.

But to be honest with you, if you don't find the Minecraft order on your Microsoft account order history page (https://account.microsoft.com/billing/orders), you will not be able to ask for a refund of it.

I think you misunderstood, my Microsoft account still owns my Minecraft account, however, my Xbox account is also linked to my Microsoft account. Whenever I try to login and access my Minecraft account, it automatically signs me into my Xbox, which does not have the Minecraft account. It's still linked to the email, but my Xbox account is stopping me from getting into the account.

The Microsoft account and Xbox account are one and the same...signing into an Xbox account would be the same as signing into a Microsoft account.....if I go into my Microsoft account history on my PC, it shows my Xbox purchases.

That sounds like you have a second Xbox and/or Microsoft account which is linked to the Minecraft account

I think you misunderstood, my Microsoft account still owns my Minecraft account, however, my Xbox account is also linked to my Microsoft account. Whenever I try to login and access my Minecraft account, it automatically signs me into my Xbox, which does not have the Minecraft account. It's still linked to the email, but my Xbox account is stopping me from getting into the account.

This Is Microsoft bro, i had a similar problem, They said me to buy another Copy of the game cause i have no way ti recover my account.

I think Microsoft Is the only Company that dont allow you to recover account from hacking or something like this.

Sorry about this situation. If you need anything else, please let me know.