Use CMB2 to add a custom metabox to WooCommerce product then add data to Additional Information tab on product page.
WooCommerce Tips
Conditionally attach files to WooCommerce order email
Attach a file to the WooCommerce Order Completed email if a specific product or variation is in the order.
Add Tracking Info to WooCommerce order
Use CMB2 to add a custom metabox to add tracking information to WooCommerce orders. The information is then added to the “Completed Order” email.
Contact Form 7 Product Enquiry form for variable products
Watch the variation dropdowns and copy the values to a CF7DTE hidden field.
Shortcode for Contact Form 7 Dynamic Text Extension
CF7DTE is great but sometimes you need a custom shortcode to get product info into the form.
Edit stock levels in WooCommerce
Add editing capability to the List stock levels in WooCommerce plugin