Option to select "Which topic categories would you like to subscribe to?" under Gnupg-users Subscription Options

[S]

Hello,
Apologies for having to ask this. Didn't find any options in the relevant page.
I would like to receive messages only for topics I'm subscribed to. But, I don't see an option to select topics of my choice either in "Gnupg-users mailing list membership configuration" page or in the concerned mailing lists page "https://lists.gnupg.org/pipermail/".
I would like to know where I can select topics for message filtering. As of now, I receive every mail transacted under the chosen mailing list.

Thanks
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