It takes time for the operational and financial regulatory aspects to be set up for every single currency.
They don’t appear to be resting on their laurels, and have product expansions planned in their product timelines, both in terms of geographic locations that they will be servicing (US, Australia, Singapore and South Africa), and also in terms of new currencies supported for their currency account function.
Compliance with both the national (e.g. FCA, PRA.) and intergovernmental regulatory agencies (e.g. ESMA, …) takes time.