While the paper is behind a pay wall, the abstract highlights that they used knock out gene editing, meaning this is not a GMO of the old days, with trans genes, but a mkdifcation one could have achieved with classical breeding if given enough time and resources.
If I understand this right, this would even in the EU now be allowed to be sold without the GMO label.
Technically, any gene sequence can be achieved with enough time and resources. Thats what evolution is afterall. Using CRISPR but not labelling it as genetically modified seems pretty wild, but then again EU does have some funky regulations.