Hello @SeanMcC,

I don’t think its possible right now, looking at he articles library. But this is nice idea I would like to do that as well.

What I find is that you can add SMS notification to you existing Back In Stock flow: here

Maybe also if you modify the snippet with phone property field, it will work. Just wondering: here

I think that you could also add an email in your for those who have not consented to SMS to add their phone number to be alerted when their product is back in stock. There is a couple other steps to get it done but there is a way to do it after the fact.