If the leap happens ( I wish it happens ) it wouldn't be because of the marriage age act. Indian law is such kind of a law that unless specifically mentioned, it applies to actions that take place from when a law comes into power or after it. It doesn't apply to things that happen in the past. So if the government raises the marriage age to 21, let's say at 12:30 in the afternoon, all the under-21 marriages that happened until 12:29:59 would not be affected.😊
Same with reel or real life.