Complete Angel's and Bob's Space Age integration with extra planets: Planetaris-arig, Planetaris-hyarion, Paracelsin, Maraxsis and Moon of Nauvis Muluna.
Not sure what is causing it, as other bug reports indicate folks are getting further along than this. But yeah, I have absolutely researched Cement Processing, I have the washer making clay, but I can't turn it into unfired clay bricks via any recipe, even though it exists in the factoripedia
Apologies - I kept going to Angel's Bioprocessing category for it because I was flicking between the recipe for Clay, then the recipe for Unburnt Clay Bricks. So whilst the Factoripedia always showed me the recipe, the ingredients, and the required research, it flicked the category over to Angel's Smelting and I missed that.
So I kept looking for it in Assembler or handcrafting the recipe in Bioprocessing and missed that it's over in Angel's Smelting category.