SharePoint programmatic reading of list returns items on some lists but not on others on the same site

Question

I have a question around the topic of reading SharePoint lists programmatically.

• The code I've written is using app level authentication.
• I am able to read items from some lists of the same SharePoint site but not others.

I think there's an issue that is related to the configuration of the permissions on the site and I wanted to know if anyone could share any thoughts around this issue.

I am at a point where I might just re-create a list myself instead of reading the one that already exists because I am not sure how to resolve this issue otherwise.

Any help would be greatly appreciated ! Thanks

def test_get_ibrx_it_list_count(self, office_service):
    """assert ibrx-it list count is greater than zero"""
    base_url = 'https://omitted.sharepoint.com/sites/example/'
    ctx = office_service.set_client_context(base_url)

    def print_progress(items):
        """
        :type items: office365.sharepoint.listitems.collection.ListItemCollection
        """
        print("Items read: {0}".format(len(items)))

    def get_total_count(target_list):
        """
        :type target_list: office365.sharepoint.lists.list.List
        """
        # all_items = target_list.items.top(50).get().execute_query()
        # all_items = target_list.items.get_all(500).execute_query()
        all_items = target_list.items.get_all(50, print_progress).execute_query()
        print("Total items count: {0}".format(len(all_items)))
        return len(all_items)

    # this list is empty as of 221227 -- this list exists and does NOT return items.
    # sharepoint_list = ctx.web.lists.get_by_title("IT Provisioning Request")

    # this list is NOT empty as of 221227 -- this list exists and it returns items.
    # sharepoint_list = ctx.web.lists.get_by_title("IT Employee List")

    # create by my user, and it returns a list of items. -- this list exists and it returns items.
    sharepoint_list = ctx.web.lists.get_by_title("Test List")

    count = get_total_count(sharepoint_list)
    assert count > 0

This code works if I'm attempting to read a list that I've created on the SharePoint site. It also works for a pre-existing list on the SharePoint site of which I did not create. However, there are some lists that I did not create on the SharePoint site which I did not create that it can't read. I'm not sure why it's able to read some lists but not others on the same SharePoint site.