"Welcome Back' flow for people who resubscribe

I know that if someone ubsubscribes from my list and then later down the line chooses to resubscribe they can do that and their supression will change from supressed to unsupressed.

However, I understand that this person would not go through the welcome flow again.

Is there a way to set up a ‘welcome back’ type flow for these people who have unsubscribed and then choose to resubscribe again? I doubt it will be many but I’d like to make sure these people receive something on signing up again. What would be the trigger for such a flow?

Thanks!