Hello,
Our theme allows adding 1 custom tab common for all the products http://prntscr.com/sctwxg (Theme Options > WooCommerce > Single product > Tabs) and 1 individual custom tab http://prntscr.com/sctxku (Products > edit your product). That’s all. If you need more tabs you can implement it by additional customization, for example, http://prntscr.com/sctxku or using third-party plugins.
Regards