If you are not going to change your country of residence, but want to take advantage of the opportunities that US citizenship provides, it makes sense to take a closer look and think about dual citizenship in the US. In general, everything that is not forbidden is allowed.

Let's make a reservation right away - the United States has not signed a corresponding agreement with any country in the world. That is, formally, to the question of whether there is dual citizenship in the United States, the answer is no.

At the same time, under American law, a person is not required to renounce citizenship by birth, pronouncing an oath of allegiance to the United States. It's just that the American authorities will not take second citizenship into account. That is, you will not be able to use it on the territory of the country. However, this is what most countries in the world do. Therefore, those who are wondering whether dual citizenship is allowed in the US should not worry - it is not prohibited.

But in some states, at the legislative level, it is forbidden to have citizenship of two countries at the same time.

In some cases, second citizenship is automatically assigned. For example, an American child was born in another country, or vice versa, foreigners came to the States and gave birth to a baby here. Both such children will be able to apply for American citizenship.

To say that dual citizenship is allowed in America would not be entirely accurate, but it is not prohibited. Having received an American passport, you have the right to claim all the rights that a person born here has. In particular - to participate in elections, pay taxes, get a job in public service. Before you can get your coveted passport, you will have to pass a language test and a test of knowledge of history and politics. In addition, candidates swear allegiance to the country. Formally, a person undertakes to be loyal to only one power - the United States of America, and no other.

In life, this implies that inside the country you only need to use a new passport. Just like it is the main document for entering and leaving the country. However, if you use a different passport outside of the States, it is not illegal. That is, formally, you refuse to serve the loyalty of another country, but no one will check whether this is actually done. According to international law, an oath does not create new or cancel old rights in relation to another country.

I think that you should read about best second passports for citizens of the United States and it will help you get the information you need in this area.