Hello,

Go to Products > All Products and select the variable product you want to edit.

At the top right of the edit product page, you’ll find the Publish section.
Select the radio button/checkbox next to Hidden and then click the gray OK button.
https://ibb.co/4PgJrhy

Your variable parent product will now be hidden from the catalog. However, it still will be visible as a single product page.

Best Regards.