Grub menu not showing on startup

Question

I have dual booted my HP Pavilion g6 Notebook PC with Ubuntu 20.04 LTS alongside Windows 10.

Whenever I restart my PC, it is directly loading into Windows by default without showing the grub menu. Now every time I turn on my PC, I have to press Esc button, and then F9 and enter and there I have to select ubuntu file and then the grub menu shows up and there I can select Ubuntu or Windows.

I want the grub menu to show automatically Whenever I turn on my PC.

Here is a list of things I've tried.

1. Secure boot is disabled in Windows 10.

2. Fast startup is off in Windows power settings.

3. bcdedit is set to

   bcdedit/set {bootmgr} path \EFI\ubuntu\grubx64.efi
   

   and I even tried,

   bcdedit /set {bootmgr} path \EFI\ubuntu\shimx64.efi
   

4. Ubuntu grub menu is up to date.

5. In /etc/default/grub file,

   GRUB_TIMEOUT_STYLE=menu GRUB_TIMEOUT=10