No Visible Text Results from Python XPATH Selenium Elements

I would like to extract the "First Published" dates using selenium on Python, yet I am facing problems trying to get any visible date results even though I'm getting successful results when looking up the xpath through the browser's inspection tab, I do get successful length results of the elements, yet no text results of the dates on my console.

My Code:

import time

from selenium import webdriver
driver = webdriver.Firefox(executable_path=r'C:\\Users\\MyComputer\\PycharmProjects\\SeleniumProject\\venv\\Lib\site-packages\\selenium\\webdriver\\common\\geckodriver.exe')
driver.get('https://tools.cisco.com/security/center/publicationListing.x?resourceIDs=93036,5834,80720&apply=1,1,1&totalbox=3&pt0=Cisco&cp0=93036&pt1=Cisco&cp1=5834&pt2=Cisco&cp2=80720#~FilterByProduct')

time.sleep(20)

prices = driver.find_elements_by_xpath('//span[@class="ng-binding" and contains(text(),"GMT")]')

for post in prices:
    if post.text != "":
        print(post.text)

print(len(prices))

driver.close()

I have tried other visible xpaths on the website to test on python and I can get the 20 vulnerability titles that show up on screen as seen when you open the link, so I am assuming that I have to tell selenium to click every link and extract the date and do that for every title ? But then how am I able to get them all in one go through the browser inspection tab ?

All help is appreciated, Thanks,