"I see this thing allows you to create interactions like a to-do list without needing to play, present, or preview. How is that event possible?"

Hi @Hereyaqos_Molla! I did some digging, and with the help of others internally here at Figma, was able to discover that this is the work of a widget in your file.

The widget is here: https://www.figma.com/community/widget/1192349601723716026

You should be able to continue using it as-needed on your end. Hope this helps!