This page explains the limitations and opportunities of Stripe Transfers internationally.
The Split Pay Plugin currently does not support splitting payments and transferring them to connected Stripe accounts that are not part of your Stripe Platform account's exact same region.
For example, if you have a Stripe Platform account registered in the US, you can only make transfers to connected Stripe accounts that are based in the US. If you have a Stripe account registered in the EU, you can only make transfers to connected Stripe accounts that are based in the EU. And so on...
We reached out to the Stripe support team about the details, and in the future, we plan to implement Direct or Destination charges, as described in their response below. For now, you must either ensure your connected account owners can register a Stripe account in your region, or you must register a Stripe Platform account in their region.
Please be informed that transfers can only be done to connected accounts in the same region . A business in one European country (defined as those in the SEPA zone) like France will still be able to send transfers to connected accounts in other European countries where Stripe Connect is available. You will, however, be unable to send transfers to connected accounts outside of your region (e.g. - to the U.S.). You can learn more about it here:If you need to transfer funds to connected accounts outside your region, there are two options:1. You can sign up for a Connect platform account in the same region as the connected accounts to which you are trying to transfer funds to. You can read more about the requirements to open a Stripe account in another country here:2. Alternatively, if you as the platform need to create charges, you can consider using  direct charges or  destination charges with the