Hi,
Unfortunately (and quite frustrating) you can only setup 1 BSD. Previous solutions was to have a second Klaviyo account (with is not what you want right? double the work for settings / user management etc..). but with Shopify Markets you cannot do this.
We have a dedicated Dutch and French domain. Shopify Markets is out quite some time now. When is Klaviyo gonna make the necessary adjustments?
Right now there is only a solutions to create some overall domain, what is not feasible with us.