Thank you for your reply and suggestions.
Similar to the witness list, our proposal list tool also allows you to query a specific user's governance vote weight and which proposals they have voted on.

As for querying which users have delegated their governance votes to a specific account,
I think it might be better to place this feature on the account information page. I have planned a series of features and intend to implement and refine them gradually.
I hope to roll out a set of fully featured, user-friendly tools as soon as possible.