I followed the steps from the following page for dual boot.
after installing I restarted the pc but I am directly booting into windows.
I checked the bios boot sequence inthat i am not able to see the ubuntu option.
Your input on this will be very helpful.
Thanks & Regards,
You may need to reinstall GRUB (in UEFI mode).
After that you may try to protect your GRUB from ruining by Windows time-to-time.
Install the GRUB Customizer App on Ubuntu using the snap store or terminal.
Then see the settings,
You can rearrange the boot menus and also the default boot load tine, it might be 0.
U can also customize other things of GRUB from the app.
HOPE THIS HELPS!!