Go to Andrew Stuart's Sudowiki Sudoku Solver web site. You can get a reading of the actual difficulty of a puzzle. Most 'hard' puzzles can be solved by an amoeba. Don't be impressed by your five minute or ten minute solve. The fact that the source says it is hard is irrelevant. They are either lying or trying to inflate your ego. Hard puzzles? Check out Cracking the Cryptic on RU-vid if you really want to see hard. Having said all that, this guy was very impressive.
I completed a Hard puzzle in 3 minutes and 12 seconds and that's my best so far. I still need to go to expert mode and I'm learning new techniques to challenge myself
Today I did Web Sudoku Easy in 10 min and 38 seconds. I've been playing Sudoku since 2020 and that's the best. Best to pursue for the neurological benefits and not dream of any competition I guess😅