Not all GNU/Linux distributions ship with a Linux-libre kernel, which is a kernel that has removed all the nonfree components such as binary blobs. The Free Software Foundation maintains a list of distributions that use Linux-libre kernels by default: https://www.gnu.org/distros/free-distros.html

More on Linux-libre: https://directory.fsf.org/wiki/Linux-libre https://www.fsfla.org/ikiwiki/selibre/linux-libre/ https://jxself.org/linux-libre/

I recently installed GNU/Linux on several computers (I have a few more to do this on), and I chose a Linux-libre distribution rather than my earlier Debian/Ubuntu based choice.