Hello,
Appearance > Widgets > Shop filters area is empty on your site, you need to add widgets there. Then do to Theme Options > WooCommerce > Shop > Shop page Filters > Widgets Columns For Filters Area.
In one of new theme versions will be added Product Filter element – https://prnt.sc/21o46q6 , but it is not available now, so use the Shop filters area, as was mentioned.
Regards