I'm new to the RPi world, but
I'm using RPi 4 with official Raspbian/Raspberry Pi OS (bullseye) right now.
When the RPi start booting, it normally displays rainbow screen, then some splash screen, before it enters desktop.
So, what if I want to customize that?
Let's say, I would like to show my custom splash screen through out the booting process, without rainbow screen, until it enter desktop.
Is that possible? Would you please suggest a way to achieve that?