It looks like the IMX219 driver for Jetson Xavier NX jetpack 5.1.1 only supports the listed modes you see on the log.
Digging a little bit if found this old post, it looks like 1280x720 120fps mode was supported on older Jetpack version (4.4.1) for Jetson Nano, then it was removed for Jetpack 4.5, and looks like NVIDIA is not supporting it anymore since then.
In case you needed you’ll need to add the support to the imx219 driver from your kernel sources.
Regards,
Enrique Ramirez
Embedded SW Engineer at RidgeRun
Contact us: support@ridgerun.com
Developers wiki: https://developer.ridgerun.com
Website: www.ridgerun.com