Onboarding Friction for High-Volume FX/CFD Clients

We're scaling our fintech solution targeting professional traders and prop firms. The KYC/KYB process with multiple Tier 1 and Tier 2 brokers for onboarding our clients, especially when dealing with entities, has become a real bottleneck. It seems like every provider has a slightly different set of requirements and turnaround times are inconsistent, leading to significant delays in client activation. Has anyone found a more streamlined approach or a particular provider that excels in high-volume, efficient entity onboarding without compromising compliance?