Make sure the page or profile is public and contents are not hidden.
Using this tool you will able to fetch tumber latest posts using the userid of tumbler
The Tumblr Count online tool is a web-based utility that enables users to track and display various engagement metrics associated with Tumblr posts. It provides individuals, bloggers, and content creators with the ability to monitor and analyze the performance of their Tumblr content. By entering the URL or post ID, the tool retrieves and presents information such as the number of notes (likes and reblogs) received by a post, the follower count for a Tumblr blog, and other engagement indicators. This information helps users gain insights into the reach and impact of their content, identify popular trends, and evaluate engagement within the Tumblr community. The Tumblr Count online tool offers a convenient way to assess the success and effectiveness of Tumblr posts and blogs, enabling users to make data-informed decisions to optimize their Tumblr presence.