@Hamstr read here: https://www.oas.org/juridico/english/treaties/a-40.html

The Convention on the Rights and Duties of States is an international treaty signed in Montevideo, Uruguay, on December 26, 1933.

The convention establishes the definition of the State, its rights and obligations.

In Article 1 it establishes four characteristic criteria of a State that have become part of customary international law.

They have been recognized as confirmation in International Law, establishing that a State as a person of International Law must meet the following requirements:

ARTICLE 1

The State as a subject of International Law must meet the following requirements:

I. – Permanent population (me) II. - Determined territory (my body) III. - Government (I can be my own gov) IV. —Ability to enter into relations with other States (happy to do that anytime)

Under these guidelines, any entity that meets these criteria can be considered a sovereign state under international law, whether or not it has been recognized by other states.