This isn't what is usually meant by "technological singularity". It is an inflection point where technology growth becomes incontrollable and unpredictable, usually theorized to be cause by a self improving agent (/AI) that becomes smarter with each of its iterations. This is still standard technological progress, human control, even if very fast
It’s basically when AI starts self-improving. I think this started with large language models. They are central to these developments. Complete autonomy is not required for AGI-nor therefore for the singularity.
It's not really "human controlled". It's an evolutionary process, researchers are scanning the space of possibilities, each with a limited view, but in aggregate it has an emergent positive trend.