Please share you website URL.
It's showing a different menu for the Mobile View. There might be the option to choose a separate menu for the mobile view. It might be auto-selected you can change it.
If you need my assistance to fix it, I'm happy to help. Add me as staff so I can fix it asap for you.
Name: Zeian Shahzad
Please have a look and let me know if you need any assistance.