Hello, @Abhiram_m_s
Thanks for the question and sorry for the delay.
You may try reference the following:
ConfigTools->Peripherals
chenyin_h_0-1709780771048.png
Then press Can_43_LLCE_1->CanGeneral
chenyin_h_1-1709780771056.png
Stroll down to find the two options related with headless mode as decribed, press the plus icon and then the checkbox could be shown.
chenyin_h_2-1709780771063.png
Hope it helps.
Best Regards
Chenyin