SiYuan additional features data security

Hello devs and users,

I need to ask about SiYuan's available additional features: ABC, Chart, FlowChart, GraphViz, Mermaid, Mind Map and PlantUML.

I wish to use SiYuan in my organization, but my legal departament asked me how do those features work? Are those all local implementation and libraries, therefore they render data locally, or are those sending data to a remote server for rendering? I'm asking for local Desktop installation.

Are there any other communications with the desktop app that should be brought to attention?

Thank you