Joomla has a breadcrumbs module on board, which lets you display the navigation paths at a certain module position. So the user can easily navigate through the website and knows where he is in the site structure at any time.
If you have now integrated the Breadcrumbs module into Joomla, activated it and set the cache to "No Caching", then it is still possible that no breadcrumbs are displayed for certain page contents.
The reason for this is relatively simple:
Therefore the Breadcrumbs module is not displayed in Joomla
The Breadcrumbs module in Joomla only works if the corresponding menu is activated. So let's assume you have published an article about fish under "Diving", then there must also be a published menu item with the category "Diving".
If this is not the case, the navigation module in Joomla will not give you a correct path.
So always publish a corresponding menu entry to make the Breadcrumbs module work correctly.