There’s a kernel option to disable the text and it’s on by default on Arch, but not on Ubuntu.
Edit: It seems that the kernel parameter is not on by default. I’ve always used GRUB and the text hasn’t appeared for me until I’ve removed the quiet option in the GRUB config file so I thought it was on by default. It might be on by default with GRUB or I’m remembering wrong.
it’s on by default on Arch
I don’t think there is a default in Arch. You have to choose your own bootloader, and the documentation just lays out the options on what kernel parameters to pass. For systemd-boot, the Arch documentation gives example configurations that don’t include the “quiet” parameter.