I've been seeing local or regional brands that the grocery store never used to carry, that apparently are being used to fill gaps in the supply chain. Not infer

I've been seeing local or regional brands that the grocery store never used to carry, that apparently are being used to fill gaps in the supply chain. Not inferior substitutes, but things that make me ask why the heck didn't they carry these before? It makes me feel like, although yes, regulating markets can harm them, but there were problems, there must have been corruption, the distribution system wasn't handed down from on high by an invisible hand, etc.