Try long-pressing in the empty area of the screen. Every Android phone is slightly different but the long press should reveal additional menu options. One of them should say “widgets”.
that said, you do need to have an app that also provides a widget. Maybe your weather app doesn’t have that option. I’m also not sure if there is anything like step counter in a widget. That said, I’m sure your phone has some helpful widgets available. Let us know if you need any additional help!
