Hello,
1/ G to Static block, create and edit static block using Elementor, the content will be your tab content, then select the static block for the custom tab -https://prnt.sc/KHsMGKu3m2BB
2/ Create products via Dashboard > Products.
Our theme allows adding a few custom tabs: – a tab common for all the products (Theme Options > WooCommerce > Single product > Tabs) OR when Single Product Builder is activated (you can desctivate it) – 2 custom tabs (common for all the products).
– 1 tab individual for every product (Products > edit product > 8theme Options > Custom tab title and Description https://prnt.sc/K9BZ2RV2XZsR ).
Regards