It is understandable but lowkey a tragedy how during the Islamic Period they were mainly just spreading writing through paper and alwaxs. Even that source from Siyu on the Swahili coast describing SomalisSheikhs from Koonfur who basically wrote Somali using the Arabic script describes how they did so in book form and manufactured books. If they made stone inscriptions as often as they did books we'd have a massive corpus even despite the civil war...
Haha yeah if we could only be so lucky. On the other hand considering how dry our climate is were much luckier than the swahili coast,southeast asia, or India. Since the climate is wet and hot in these places no old writings survive.
Considering how hard wadad script is to read and how little acess to even regular arabic manuscripts western researchers(whos numbers probably didnt even reach 20) had . It's to be expected that there is very little knowledge of Somali ajami writings.