「興味あり」ボタンを追加するテーマの拡張機能やプラグインを知っている方いますか？

[willie]

it’s around topic controls when you gonna reply a post:

Example: “interested”

[Lilly (Lillian Louis)]

so what does it do on the forum where you see it? looks like it might be from the zoom plugin (or some event / webinar plugin).