Hello Pedro Monteiro,
1)To display the stock information on the product page, please go to XStore > Theme Options > Woocommerce (Shop) > Single Product Builder > Add to Cart & Quantity > Show Product Stock Status > Turn ON and save settings. For a better reference, please see the image provided here: https://postimg.cc/1nh5Nkmh
2)To remove the information regarding free shipping, please navigate to Xstore > Sale Booster > Progress Bar > Turn OFF and Save Changes. For a better reference, please see the image provided here: https://postimg.cc/zyvMY7s9
Best Regards,
8Theme’s Team