<form xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Ui:etc/ui_configuration.xsd">
    <settings>
        <buttons>
            <button name="myoba_sync" class="Zhik\Myoba\Block\Adminhtml\Customer\SyncButton"/>
            <button name="myoba_view" class="Zhik\Myoba\Block\Adminhtml\Customer\ViewButton"/>
        </buttons>
    </settings>
</form>