square.onOnlineCheckoutMerchantSettingsUpdated subscribes to online_checkout.merchant_settings.updated for the selected seller. It requires MERCHANT_PROFILE_WRITE and MERCHANT_PROFILE_READ.
Example
automations/square-on-online-checkout-merchant-settings-updated.automation.ts
Event
Published when online checkout merchant settings are updated. The signal resolves to the officialSquare.MerchantSettingsUpdatedEvent payload with type narrowed to online_checkout.merchant_settings.updated.