Onboarding Friction for Scaling Fintech

We've been scaling up our platform rather aggressively lately, and one consistent bottleneck we're encountering is the KYB process with various payment service providers and liquidity partners. It feels like every new relationship, despite the initial assurances, inevitably bogs down in weeks of back-and-forth documentation requests, often for information already provided or easily accessible. It's not just the time sink; it's the opportunity cost of delayed launches or service expansions. Has anyone found a truly streamlined process or a PSP that genuinely anticipates the needs of a rapidly growing fintech, minimizing this friction without compromising compliance?