Hi,
Given birth-details placed Ascendent or Udaya Lagna in the Zodiac sign of Sagittarius or Dhanur Rashi and posited in the Lunar Constellation of Moola/Mula Nakshatra, ruled by a powerful Ketu…placed alongside. So, Ascendent or Udaya Lagna is caught in the Ketu-Rahu axis… Ketu has below par Vimsopaka Bala in Dasha Varga is a cause for concern. Incidentally, Lagna lord Jupiter/Guru-dev is also placed there is a saving grace. Low-profile miscreants Maandi and Gulika hoovering around is not preferred.
Moon/Chandra is placed in his Neecha-Sthana or sign of debilitation in the Zodiac sign of Scorpio or Vrischika Rashi and posited in the Lunar Constellation of Anuradha Nakshatra, ruled by Saturn/Shani-dev. So, your son started his life in the Maha-Dasha of a powerfully (in his Swasthana and his favorite abode in the Zodiac sign of Capricorn or Makara Rashi) placed Saturn/Shani-dev, who is Vakra or Retrograde. This happens to be the 2nd house of Speech. Given the birth was in the midst of Global CoVID pandemic, there is a good chance the child had limited socila interaction with relatives/friends… which could have contributed to delayed speech.
Mercury/Budha the Karaka for Communication is strongly placed in his Swasthana and Moola-Trikona, in the edge of Virgo Zodiac sign or Kanya Rashi. He lords over the 7th and 10th houses (both Kendras) and hence calls for validation of Kendrakipathya Dosha…given the upcoming Maha-Dasha (from December 2025) is that of Mercury/Budha.
All said and done, it would perhaps make sense for the parents to consider getting a detailed Psychiatric evaluation done, just to double check and make sure the child is well. And, I think making the child hear Shriman Vishnu Sahasranama at least twice a day would be beneficial.
Take care…