Hello, @monique_,
Please navigate to Porto >> Template Builder >> Blocks and create the new Block, Add/Insert/Set the Accordion into it as per your requirements and save changes, After that copy the shortcode of the created block: https://postimg.cc/nXhCW4yw and then navigate to your products, edit it and paste the shortcode of the block into the Custom Tab as shown here: https://postimg.cc/crXR9M9G
It would work properly.
Best Regards,
