What libraries/languages/stacks do you use to build your own analytics dashboards? 📈

I'm working on an MVP in React with a node backend and postgres DB. It's basically a learning platform for smartphone users in East Africa, delivered as a web app. I'm about to start work on coding the analytics dashboard piece which showcases some bespoke stuff like av.answering accuracy, improvement, cohort analysis etc.

I'd love to hear how other people have built customer facing analytics dashboards into their products, particularly any useful libaries or examples using JS/React OR strong arguments not to go this way.

Any tips and ideas would be greatly appreciated!