Been building a SaaS that touches Instagram, WhatsApp, and Google Business Profile for small businesses. Honestly thought the engineering would be the hard part. Turns out getting approved to actually use these platforms took just as long. Meta rejected my app review once because my screen recording didn't match exactly what I was requesting access for, small mismatch but enough to bounce the whole submission. Google's Business Profile API approval was its own headache too, barely any real doc...