I flashed my Jetson AGX Xavier using Jetpack 5.1.5. However, I didn’t install nsight compute and nsight system.
Is there any way I can install them without using SDK manager? (As SDK manager keeps saying that my device has a different image version from the current host.)
Yes, you can do that. The SDK Manager interface does not make it obvious, but those things listed in the first screen as to what the flash will do can actually be unchecked. The part about flashing and installing most things would simply be unchecked and it would perform only the part you are asking about. Also, if you uncheck flash, for those options which go to the Jetson you would not use recovery mode (after a flash the Jetson automatically reboots and the install of optional content occurs over ssh to the fully booted system; for installation to host PC you don’t even need a Jetson attached). Just try clicking on items like flash to see if you can uncheck them.