Onboarding hurdles with new PSPs for high-volume crypto transfers

We're currently scaling out our platform's capacity for international $BTC and $ETH transfers, specifically looking at a new PSP for EUR to stablecoin conversion. The KYB process, particularly for corporate accounts operating across multiple jurisdictions, is proving to be a real bottleneck. It feels like we're always running into differing interpretations of UBO declarations and source of wealth requirements depending on the region the PSP is domiciled in. Anyone else experiencing this kind of friction when trying to onboard new partners for significant transaction volumes, or have you found specific types of PSPs that are generally more streamlined for cross-border crypto-fiat gateways?