From my understanding
WidgetRTC.h relies on
TimeLib.h so I guess you could call that library directly from your sketch, skipping the UI widget.
However, setting up a NTP function in your program.might lead to connectivity issues with the Blynk server (I’m really, really guessing about this). Like, there must be a reason to why they created the RTC Widget in the first place!
I’m still trying to figure out your “type” and clandestine motives