Solved
Most of the categories were reported unspecified

What could be the reason??

What could be the reason??
You may refer to https://experienceleague.adobe.com/docs/analytics/technotes/unspecified.html?lang=en for the why unspecified in reporting.
For your case, you need to check your tracking to understand how value goes into "Web Hierarchy - Tier 1" and your report is saying that it is very often no information tracked into the "Web Hierarchy - Tier 1".
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.