Hi,
Domain specific to country will not be listed in search result of other country because from domain extension google knows it is for specific country .
For example .it for italian ,co.in for india.
Regarding domain age ,it is important.
Google bot intelligently manage new pages on old domain without affecting page rank. Sometimes It get better ranking because of better loading speed,description and other seo factors.
PrestaShop Tutorials Videos [How to do Tasks]
https://www.prestashop.com/forums/topic/907438-prestashop-tutorials-videos-how-to-do-tasks/