You should check out https://packager.turbowarp.org/
It is a way to repackage your scratch file into HTML or Exe, so that people can more easily play it.
Most of your potential players are not going to toy around with a .sb3 file and convert it themselves. If you want to be a game developer and get people to play your game, you've got it make it as easy as possible so people can play it.
Hope this helps, good luck!