While there is AFAIK no genetically engineered variety of sweet potato being cultivated, every cultivated variety of sweet potato bears genetic traces of having been modified by Agrobacterium tumefaciens, which is the bacterium which is widely used to edit plant genomes.
The summary of the issue, as I understand it, is as follows.
The modifications do much more than we realised, and the impacts are poorly tested. That’s the gist. It’s enough for me to go “there could be dragons here”, but I honestly haven’t bothered to try and change any purchasing decisions. I think the horse has already bolted anyway. Doesn’t the gmo end up in pretty much everything regardless?
Did she make any reference to studies?