DynamicRows components are a list of records where users can add new records, edit their records, change their display positions, and navigate through the collection. 

There are some configuration option which needed for dynamic row

Option	Description	Type	Default
addButton	button is use to add new row	Boolean	–
addButtonLabel	Use for adding a label to button	string	Add
pageSize	The number of record to be displayed on one page	Number	20
additionalClasses	Sets custom classes to the component’s DOM block.	object	{}
defaultRecord	The default (first) row when the component is initialized without data.	Boolean	false
deleteProperty	The property added to a record data object when the record is deleted. Applied if the ‘deleteValue‘ option is enabled.	String	‘delete’
dndConfig	used for Configuration of the drag and drop (DND) plugin for dynamicRows.	object	{name: '${ $.name }_dnd', component: 'Magento_Ui/js/dynamic-rows/dnd', template: 'ui/dynamic-rows/cells/dnd', recordsProvider: '${ $.name }', enabled: true }
CollasibleHeader	Enables or disables the collapsible functionality for the header (if columns header is enabled).	Boolean	false
columnsHeader	Used for hides and shows columns header.	Boolean	true
columnsHeaderClasses	add custom classes for header(if header is enabled)	String	‘ ‘
component	The path to the component’s JS constructor in terms of RequireJS.	String	Magento_Ui/js/dynamic-rows/dynamic-rows
currentPage	Displayed current page number	Number	1
deleteValue	Adds the deleteProperty property in the data object for the deleted record.	Boolean	false
disabled	Initial component’s state. When set to ‘true‘, users cannot take action on the element.	Boolean	fase
fallbackResetTpl	The path to the fallback reset (restore to default button) .html template.	String	ui/form/element/helper/fallback-reset-link
identificationProperty	The identification property added to the record data object.	String	record_id
pageSize	Number of record one page	Number	20
recordTemplate	The path to the .html template of a records. The list of templates is declared in the templates property.	String	record
Template	The path to the component’s .html template.	String	ui/dynamic-rows/templates/default
visible	Initial component’s visibility. When set to false, the display: none CSS style is added to the component’s DOM block.	Boolean	true

Here is xml file path:

Namespace/ModuleName/view/adminhtml/ui_component/form.xml

Extends UiCollection:

• app/code/Magento/Ui/view/base/web/js/dynamic-rows/dynamic-rows.js
• app/code/Magento/Ui/view/base/web/templates/dynamic-rows/templates/default.html

Here is code for DynamicRows component integrates with the Form Component:

<form>   
    <dynamicRows name="dynamic_rows">
        <settings>
            <addButtonLabel translate="true">Add Record</addButtonLabel>
            <additionalClasses>
                <class name="admin__field-wide">true</class>
            </additionalClasses>
            <componentType>dynamicRows</componentType>
        </settings>
        <container name="record" component="Magento_Ui/js/dynamic-rows/record">
            <argument name="data" xsi:type="array">
                <item name="config" xsi:type="array">
                    <item name="isTemplate" xsi:type="boolean">true</item>
                    <item name="is_collection" xsi:type="boolean">true</item>
                    <item name="componentType" xsi:type="string">container</item>
                </item>
            </argument>
            <field name="field_1" formElement="input">
                <argument name="data" xsi:type="array">
                    <item name="config" xsi:type="array">
                        <item name="fit" xsi:type="boolean">false</item>
                    </item>
                </argument>
                <settings>
                    <validation>
                        <rule name="required-entry" xsi:type="boolean">true</rule>
                    </validation>
                    <dataType>text</dataType>
                    <label>Field #1</label>
                </settings>
            </field>
            <field name="field_2" formElement="input">
                <argument name="data" xsi:type="array">
                    <item name="config" xsi:type="array">
                        <item name="fit" xsi:type="boolean">false</item>
                    </item>
                </argument>
                <settings>
                    <validation>
                        <rule name="required-entry" xsi:type="boolean">true</rule>
                    </validation>
                    <dataType>text</dataType>
                    <label>Field #2</label>
                </settings>
            </field>
        </container>
    </dynamicRows>
</form>