India won the T20I series against New Zealand 2-1, winning the decider in Ahmedabad by 168 runs. This is not a record for all T20Is, but it is a record for T20Is between full members.
The previous record for matches between full members was 143 runs, which has occurred twice: India vs Ireland in June 2018 and Pakistan vs West Indies in April 2018.
Looking at individual scores:
We see that Shubman Gill’s 126* is the highest T20I score for India. It surpasses V Kohli’s 122* vs Afghanistan in Sep 2022.