With a standard theme like TwentyTwentyOne you don’t see the option either? Note: do not use TwentyTwentyTwo or Three as a test because these are FSE themes that no longer have widgets.
No I don’t. Something happened after migrating to dev subdomain and switching from 2014 to Avada Theme. And I can’t figure it out. ….
Ah, you use Avada. Then I would recommend you to contact their support, which you also bought: https://avada.com/help-center/
By the way, they also have their own article on the subject of widgets: https://avada.com/documentation/avada-widget-options/