Is there a way for people to claim a listing? I want to mass populate listings for businesses that are useful and would like people to be able to to claim their business.

I miss point of claim business feature.

I want to add listings and myself and e.g. businesses and  have a claim listing feature for people to claim the listing

I still dont get it, what you get from claiming listing?

Because the marketplace I have built is at an early stage, we initially seed the platform with basic business listings using publicly available information (business name, category, city).

These listings act as placeholders only. No products, prices, or private data are published.

Each listing includes a “Claim this business” option, allowing the verified owner to take ownership, update details, or remove the listing entirely.

This model is commonly used by directories and marketplaces to solve the cold-start problem while still respecting business ownership and data control.

If you use geniuine email address, it should be OK to do such feature.
Without it, better not to integrate at all.