Or play in privacy mode.

The intent, I think, is to mimic how Wordle works. Wordle has one puzzle per day, progress and statistics are stored in a cookie on your local machine (and only there). You can clear the cookie or use another browser or privacy mode to play multiple times per day, but you'll always get the same word.

It's a clone of Wordle. There is a single correct answer per day, and everybody gets the same puzzle. There will be a new answer tomorrow.

So, since the puzzle will be the same, there isn't a huge amount of reason to let you reset.

The page could have made that clearer. (Wordle says it when you open it the first time, and also under the help menu.) I double-checked this by looking at the sourcecode.

It’s intentional, same as Wordle’s designed did it.