Magento2, in system xml file, add custom field product “SKU” “price”, “sale price”” and a button for “update price” dynamically

I want when admin select custom field product “sku”, able to Change “price”, “sale price” and a button for “update price” dynamically.

I created only field by system.xml but unable to its functionality dynamically.
please help.

<?xml version="1.0"?><config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Config:etc/system_file.xsd">
<system>
    <tab id="irshad_custom" translate="label" sortOrder="10">
        <label>Custom Tab</label>
    </tab>
    <section id="test_section" translate="label" sortOrder="130" showInDefault="1" showInWebsite="1" showInStore="1">
        <class>separator-top</class>
        <label>Price Configuration</label>
        <tab>irshad_custom</tab>
        <resource>Irshad_Ahmad::config_ahmad</resource>
        <group id="custom_settings" translate="label" sortOrder="10" showInDefault="1" showInWebsite="1" showInStore="1">
            <label>Manage Configuration</label>
            <field id="enable" translate="label" type="select" sortOrder="10" showInDefault="1" showInWebsite="1" showInStore="1">
                <label>Enable</label>
                <source_model>MagentoConfigModelConfigSourceYesno</source_model>
            </field>
            <field id="product_sku" translate="label" type="text" sortOrder="10" showInDefault="1" showInWebsite="1" showInStore="1">
                <label>Product SKU</label>
                <comment>Manage multiple squ with comma separated</comment>
                <field id="enable">1</field>
            </field>
            <field id="price" translate="label" type="text" sortOrder="20" showInDefault="1" showInWebsite="1" showInStore="1">
                <label>Price</label>
                <validate>required-entry</validate>
                <comment>Please store price</comment>
                <field id="enable">1</field>
            </field>
            <field id="sell_price" translate="label" type="text" sortOrder="30" showInDefault="1" showInWebsite="1" showInStore="1">
                <label>Sell Price</label>
                <validate>required-entry</validate>
                <comment>Please store Sell price</comment>
                <field id="enable">1</field>
            </field>
            <field id="update_price" translate="label" type="text" sortOrder="40" showInDefault="1" showInWebsite="1" showInStore="1">
                <label>Update Price</label>
                <validate>required-entry</validate>
            </field>
            <field id="update_button" translate="label" type="button" sortOrder="50" showInDefault="1" showInWebsite="1" showInStore="1">
                <label>Update</label>
            </field>
        </group>
    </section>
</system>