Brain organoids have been around for a while. You can even rent their processing power.
They have issues, including a hard limit to their lifetime and growth potential. And the ethics involved shouldn’t be underestimated.
They can and have been wired up to animals and when they do- they start vascularizing and growing and influencing the organism they are attached to.
As an organoid, they probably lack the majority of things that would cause suffering- but we have used this “logic” to torture humans and animals in the past, so I am not fully convinced.
I am also extremely interested in what these organoids can eventually lead to- but we need to not judge based on clickbait articles and use actual science and ethics to proceed.