The cards are most likely in the Zanki deck.
Can you go to browse → tags → see if you see “AK_Step1_V12”. If you see that, that means the deck installed.
You will need to move all the cards from your Zanki deck to a new deck.
If they are not there, do this first:
Please try resetting your local changes. To do this:
Go to browse in your Anki → at the top click on ankihub addon tab → press reset all local changes
This will restore everything to what AnkiHub has unless you have specifically protected those fields
Then move them:
See how to do so here: It says my AnKing deck was installed, but I can't see the new deck