I found this link: https://search.roblox.com/catalog/json?Category=2&Subcategory=2&SortType=4&Direction=2
The original is: https://www.roblox.com/catalog
You can use selenium to controll a browser. https://www.selenium.dev/ It can give you the contend of a item and subitem (and much more). You can press alt i think on firefox and then developer -> Inspector and hover over the Item of the webpage. It shows you the responding html text the python binding: selenium-python.readthedocs.io