If I reset my settings on sky q box, will I lose the new sky sports plus app

If you reset your Sky Q box to its factory settings, it typically will erase all custom settings and preferences, including any downloaded apps. However, the Sky Sports app should be available for you to download again after the reset, as long as it's still supported on your device. You'd just need to log back in to your Sky account and reinstall any necessary apps. Always ensure to have any important account information and settings noted down before a reset.