Hello! In your case, Lithuanian law allows a child to have dual citizenship if one of the parents is a Lithuanian citizen. To do this, you need to submit an application to register the child's citizenship with the relevant authorities. After the documents are verified, the child will receive Lithuanian citizenship without losing the citizenship of their birth country. This process can take some time, as it is necessary to verify the birth documents, family ties, and citizenship of the parents. To avoid any mistakes, it's best to contact experts who help with lithuania dual citizenship issues. They will prepare all the paperwork and oversee the process, including passport issuance.

I want to add that it is better to clarify the list of documents in advance, because sometimes the rules change slightly. Also advise you to carefully check all the dates and entries in the certificates so that you do not have to change anything. Personally, the procedure went smoothly, just took a little more time than they expected. The main thing is not to delay and serve everything in advance.