It's one of all the places of the world, but too little is known about germanic history. So little was written down. Scandinavian/Nordic history is known from some written sources, but around the current location of Germany, there seems to be even less.

It's thought that household use of runes could have been using carvings on wood (rune shapes are made to be easy to carve, mostly), and wood doesn't survive well, except we have some medieval finds of runes on wood.