I don’t think there’s an official HK deck, but I won’t leave you hanging.
If you want to do Cartomancy (note: this is not technically a Tarot deck, but you can use it in the same way), then there is a Hello Kitty card deck you could use.
Playing cards! Use for Cartomancy but not the usual Tarot!
Not quite what you’re looking for? Then we go a little off-brand, but the same look. These are actual Tarot cards… just not quite the brand. So cute though.
You might also want to check out the anime deck thread: New Anime Deck Changed My Mind
Or my other suggestion, cute minimalist Kawaii style which might fit what you’re looking for, even if it’s not all kitties:
