Well, I guess I know now the answer to my own question... We finally decided to test him. So it wasn't hyperlexia as in a disability. It was just a very smart boy figuring things out for himself even as young as 2.5y....

VCI - 146
VSI - 129
FRI - 137
WMI - 125
PSI - 132

WISC-V FSIQ - 146