Nice.
I’ve seen a similar thingy, but can’t remember the name/command.
[edit: Found it: https://fossbytes.com/linux-distribution-logo-ascii-art-terminal/]
For Neofetch I found (source: https://www.linux-redaktion.com/blog/systeminformationen-huebsch-aufbereitet/):
man neofetch shows an overview, neofetch --help lists available parameters.
Maybe it would be easyer to edit the config file under ~/.config/neofetch/config.conf.
Here are some nice examples to tweak with.