Hi bh4216la,
Are you using the devkit or custom board for AGX Orin?
What’s your Jetpack version in use?
Please share the full dmesg for further check.
and also check if the following topic could help for your case.
AGX Orin: rtc0 vs rtc1 - Jetson & Embedded Systems / Jetson AGX Orin - NVIDIA Developer Forums
Jetson Orin Nano RTC using a battery not working - Jetson & Embedded Systems / Jetson Orin Nano - NVIDIA Developer Forums