i cant find a way
Flash has been dropped by most (if not all?) major browsers. As mentioned above Adobe also dropped it. I’m not sure if Flash Games were supported before, but I haven’t seen any in a long while. If they were never supported I’m sure they never will.
In any case, I would strongly suggest against making a game in flash. It’s a dying technology that has been phased out in the past few years.
Is there a specific one you were looking for? Itch has web games, which to a user look the same as flash games (as in they are played from the browser itself).
If you are looking for web games in general, you can try with the “Web” filter, or “HTML5”. This website has plenty of those games. Hope you find what you were looking for :)