By default, main columns are visible in grid,
but there are additional columns, that can be enabled from “Columns” drop-down on the top-right side.
for Custom Column you need to Configure UI grid component in following way
extend UI configuration for sales order and sales invoice grid introducing
app/code/VENDOR/MODULE/view/adminhtml/ui_component/sales_order_grid.xml
Add the following XML snippet to the UI configuration file
<!-- Add the column "custom_column" (Custom Column) to the sales invoice grid. -->
<listing xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Ui:etc/ui_configuration.xsd">
<columns name="sales_order_invoice_columns">
<column name="custom_column">
<argument name="data" xsi:type="array">
<item name="config" xsi:type="array">
<item name="filter" xsi:type="string">text</item>
<item name="label" xsi:type="string" translate="true">Custom Column</item>
</item>
</argument>
</column>
</columns>
