EasyPeasy behaves like AROS, USB-Stick is automatically mounted at system startup, opuure after insertion
Even if you do not want to use the Linux host, for sure you are required to learn a few basics about linux.
I can't be bothered attempting to understand an abandoned linux distribution like EasyPeasy from decades ago (i have more than enough trying to understand my own used linux distribution and its particular quirks).
Also on linux you need to mount removable storage.devices, see for an example
https://linuxconfig.org/howto-mount-usb-drive-in-linuxBut, also linux has 'grown up' in that most distributions have an automount feature that whenever you insert a media in a removable storage device (such as USB/DVD/CD) it will automatically be mounted by the system.
In my distribution there is special mountpoint (directory) called /media and inside that directory all removable storage is automatically inserted whenever you physically insert a media into such a device (hence the name of the mountpoint).
But, where easypeasy mounts its removable devices (without falling back to the systems /dev directory) i have no idea. That is for you to figure out AMIGASYSTEM.
As a sidenote: It is the second time you state that something in Linux "is just there" (pendrive now, the desktop environment/launcher the other), but in fact these kind of things are depending on the distribution that you use. No distribution is alike (although there are usually many similarities) and you have to figure out such things yourelf as other people can not do that for you (unless they install the exact same version of your EasyPeasy distribution)..... There is a reason distributions like Ubuntu exists (as everyone else is using it: which is exactly the reason I don't use it

)