thank you for your reply, I asked his mother to issue a court order to transfer custody to me, any other documents needed besides marriage, divorce certificates and the childbirth certificate.
may I ask do I have a better chance with his application if I used an immigration solicitor or not.

Hi, hello everyone, I got my British citizenship in 2018. I need to bring my son aged 16 to join me here in the UK. he s Egyptian and has been living with his mother in Egypt since the divorce in 2017. he was born outside the UK.
can anyone help pls, where to start and what documents needed