It’s hard recognizing checkmates

I had this problem too and still do sometimes! learning different mates have helped me put some tricks up my sleeve. 😊

This is something you should study immediately If you can't recognize them, you can't set it up to win nor defend against it. Finding things like mate in 3-5 moves takes a while, finding the most efficient (fewest moves) way takes a while, but finding 1 move mates is something a beginner needs to know right away. There should be a tutorial on those somewhere in here.
(1) when my opponent delivers checkmate: “wait, that is a checkmate?! how come I didn’t see it!”
(2) when I accidentally checkmate my opponent: “wait, that is a checkmate?! how come I didn’t see it!”