1/ Please, provide also wp-admin access (in private area) for the expa*****.com web-site
2/ give us a link to the product on expa*****.com that had such Specification tab (from Electro theme) before so that we could check it directly
3/ we will check if such data is for this product is in database and if there is then we will try to show it in tab and otherwise If product does not have such area (all new products that will be created after migration to XStore theme from Electro will not have Electro field) you will be able to add such content in our own custom tabs (https://prnt.sc/pVK6rjzCxIkn) and https://prnt.sc/oqx44dk6Iddy (backend)
What do you think about it? Maybe you have another idea (about the 3d item above)
Regards