Didn't both parties request for the extension, or am I misinformed?

I'm not sure why letting more people vote is bad?

Unless you're relying on suppressing the capacity of certain parts of your population to vote to win an election, like my country's right wing government has done, because last minute enrollment voters tend to not vote for them.

https://www.justice.govt.nz/about/news-and-media/news/electo...

When "but they let more eligible voters vote, that's cheating!" is your argument against someone in a democracy, it's time to take a good look at yourself.

Have polling stations open for a week, run them 24 hours on election day. Have so many that there's never a queue, and no one complains that they have to go far. That's democracy. The price is negligible.