Hey @Kia_Jadwat, appreciate you reaching out. I checked into this again. The Business entity setting currently available in Markets applies to stores using multiple Shopify Payments accounts, so it still doesn’t support assigning a US Shopify Payments entity and South African third-party gateways independently in the way you’ve described.
Any third-party provider enablement would also need to be handled through the provider’s existing relationship with Shopify rather than through a setting the merchant can enable today.
That said, this is still logged as a feature request on our end, so it is something we’re aware of. Appreciate you following up on this - let me know if I can clarify anything here!