reCAPTCHA for WooCommerce allows you to add google reCAPTCHA on Login, Register, Lost password form. Also you can set reCAPTCHA on Checkout page.
Demo: https://codecanyon.net/item/recaptcha-for-woocommerce/17795842
Protect WordPress website forms from spam entries with Google reCAPTCHA.
Demo: https://bestwebsoft.com/products/wordpress/plugins/google-captcha/