The Answer;
In the name of Allah, Most Gracious, Most Merciful.
Yes, anyone whose ‘Aqiqah was not performed [in childhood] can perform it in adulthood or even in his old age. (Fatawa Razawiyyah, vol. 20, pp. 588)
The beloved and blessed Prophet(saw) performed his own ‘Aqiqah after he had made the proclamation of his Prophethood. (Muannaf ‘Abdur Razzaq, vol. 4, pp. 254, Hadith 2174)
And Allah(swt) alone knows best.