Onboarding friction with new payment rails for SMBs

Curious to hear others' experiences navigating the onboarding process for newer payment rails, particularly for SMB clients looking to accept less conventional payment methods beyond standard card networks. We've seen significant variability in KYC/KYB requirements and processing times, with some providers appearing to have a more streamlined approach than others, even for what seem to be fairly standard business profiles.

Specifically, what kind of challenges have you encountered with data requirements or technical integration that caused unexpected delays? And how are you managing client expectations when the PSP's internal compliance can add weeks, sometimes months, to go-live dates? It feels like some providers are still figuring out their own risk frameworks for these emerging payment types, leading to a fragmented and often frustrating setup process.