Can I substitute Hong Kong curry cuttlefish with pre-cooked Joya octopus?
Yes you can, please try it and report back.
When using precooked octopus, you need to cut them in small bite size pieces and add them to the curry at the last moment so they get up to proper temperature and soak up the flavors of the curry.
Remember that when substituing ingredients, the original recipe might not taste or feel the same as the original recipe.
Next time, please link to a recipe; it'll make answering easier.