Client and We have Asana (separetely) - Is there a way that they and we can see shared projects in their normal login

Our client has Asana (free) and we have Asana (paid). We have invited client team members to our projects, however they do not see them in their own project listings. Is there a way that we can set them up so that when they log in to their own Asana instance, their team members can see our projects in their listing of Projects?

You can’t really “merge” two organizations like this. Projects appear in the org they are attached to.