gulp theme:deploy ...

is only valid in the ThemeDevelopmentTools. If your migrating from an earlier version, when your migrating your theme typically the way I do it is these steps: 1. Unzip the new dev tools ( ThemeDevelopmentTools-22.2.0 ) 2. CD into the theme dev tools folder and run

npm install

3. run

gulp theme:fetch

4. select your site

But assuming all your customizations are done in extensions, really the quick way to do it all is just right through the extension manager. Once you point your test domain to the 2022 SSP that you want to use, just create a new extension activation and use your theme + extensions from the old version and most of the time they should just all work. If you don't see them as options when you go to activate you can change the target version for them and then they'll show up