Updated RHEL 9 Password Reset Process (due to changes in dracut):

1. Press e to edit the GRUB boot options:

   • This step allows you to modify the boot options temporarily.

2. In the linux line, change ro to rw (this is just before crashkernel):

• The root filesystem is mounted as read-only (ro) by default. Changing it to rw ensures that the root filesystem is mounted as read-write, allowing you to make changes such as modifying the root password.

• Find the line starting with linux or linuxefi, then modify ro to rw.

Press Ctrl + e to go to the end of the linux line and add /init=/bin/bash:

• This bypasses the default system initialization process and brings you directly into a Bash shell in the root environment, allowing you to troubleshoot or reset the password.

• This method is a substitute for the traditional rd.break approach.

for continuity refer below link

https://www.sws-international.com/?p=494