The proposed map would have targeted Indiana’s two Democratic U.S. representatives to hand all 9 seats to the GOP.  Around 45% of Indiana’s party-affiliated voters are Democrats.

So 45% of the constituents, 22% of the representatives.

Sounds to me like they approved a GOP-gerrymandered map.

So 45% of the constituents, 22% of the representatives.

That’s not what that sentence is saying. Note the “party-affiliated” qualifier. I checked and according to the first search result I found 25% of Indiana voters are registered Democrat, 31% are registered Republican, and 44% are “unaffiliated”.

Source: independentvoterproject.org/voter-stats/in