Calendar with event manager

I have started the webapp with “onsen ui”, I had an event calendar (JS) prepared to use it in my webapp, but I find that it is not 100% compatible with onsen ui, I think it is a z-index problem or something like that . But I am open to change the library (onsen) if necessary to do the design. The event calendar is this:

https://demos.creative-tim.com/fullcalendar/fullcalendar.html?_ga=2.116072069.2057536063.1672160431-2137921555.1672160431

I am also open to using another if necessary, I incorporate it so that it is more or less clear what we want to do.

Thank you
All the best