That is correct. Under the Dissolution of Muslim Marriages Act, 1939, a Muslim couple can file for divorce in any court in India, regardless of where the marriage was solemnized. This is because the Act is a central law, which means that it applies throughout India.
However, there are some practical considerations that may make it more convenient to file for divorce in a particular court. For example, if the couple lives in a particular city, they may want to file for divorce in the family court in that city. This is because family courts are specialized in dealing with family law matters, and they may be able to process the divorce more quickly than a regular court.
Ultimately, the decision of where to file for divorce is a matter of personal preference. However, it is important to be aware of the legal requirements and practical considerations involved in order to make an informed decision.