Where can I find D2C and B2C founders

I'm developing a marketing automation tool for D2C and B2C businesses and am about to launch the product. But before that, I would like to talk to the business owners to understand their pain point better. I don't think they are active Product Hunt users. So, where can I find them? Is there any specific group in indie hackers even?
I know Linkedin might be a good option, but I want to know if there is any community where I can go and pitch my idea