Guys is this improvement


Nice improvement.
I'd suggest you continue to solve more and more puzzles to increase the number of tactics you are seeing and getting used to solving. Improving your pattern recognition for tactics will be one of the best uses of your time. I'd start by learning the patterns thematically, eg. by category "Fork, Skewer, X-Ray..." etc before testing yourself with the randomised pool of puzzles.

I wouldn't put too much emphasis on what the engine says, because it 'thinks' in a way that often doesn't make sense for us mere humans. Your rapid / blitz rating is in my opinion the best representation of your strength, and how well you improve.
If you want to continue improving you should study tactics (as St4ffordGambit said, by category is better) and most importantly analyze your games, i.e. after a game you should look at it and find (without the engine) the decisive mistakes made by both sides and what could have been done instead.