Alternative or automated solution that would allow us to enable the "Update Unpaid Invoices" field?

Hello,

We recently imported supplier bank account information at the site level using the REST API. However, we noticed that this information is not being reflected in the Scheduled Payments section for existing unpaid invoices.

We also confirmed that the field "Update Unpaid Invoices" cannot be set via FBDI, SOAP, or REST API.

Our client has multiple cases where this field needs to be applied in bulk.

Is there any alternative or supported automated method (e.g., integration, script, or ESS job) that can help us update this field for a large number of unpaid invoices?

Any insights or guidance would be greatly appreciated.