Hey, you don't need the Crash Handler or Player included as separate downloads. You really just need to compress (with .zip or .rar or whatever compression) the whole folder that Unity creates when it builds the Windows build and upload that. I'd love to try it out but I'm on macOS :( You can hide the two files (crash handler, unity player) in your dashboard.
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Awesome, I'll take a peek
EDIT - The files look correct but it's still just the Windows build in that folder. To do a macOS build you need to first add mac build support. You can do that part in the hub. Open Unity Hub app > Installs > Select the specific install (Unity editor version) you used to build this game > Click the three dots in the upper right corner of the install > Add mac build support. Then reopen your project in the Unity editor > File Menu > Build Settings > Select Standalone Windows/macOS/Linux but change the target to macOS.
NOTE: You may actually need a mac to build a macOS app. Unless it's a java app it may need to be signed (through Xcode - which only runs on macs) but I'm not sure about that part. Anyway, hope this helps.