Hi,
You need to enable registration in the settings of WooCommerce plugin. WooCommerce > Settings > Accounts & Privacy > Account creation
https://docs.woocommerce.com/document/configuring-woocommerce-settings/#accounts-and-privacy-settings
Also, watch these videos – https://youtu.be/mBp33hPMgnA https://youtu.be/eDclashcCwo
Regards