Businesses in Indonesia, regardless of location, should know how to register a trademark in Indonesia https://patendo.com/how-to-register-trademark-in-indonesia/. The process may not be extremely difficult, but it's not overly easy either.
Before you can register the trademark, you will have to perform a comprehensive (trademark) search in the intellectual property database of the country. In order to do so, they will likely need a professional guidance and assistance from the expert.