عدم تدوين الكلام في زمن الصحابة
The question of why kalām was not separately and systematically written down in the Companions' period.
وقد كانت الأوائل من الصحابة
The earliest Companions were in a situation in which...
Tadwīn means organizing a body of knowledge into arranged chapters, technical categories and specialized written works. The absence of this kind of systematic compilation is not the absence of the subject matter itself or proof that no relevant discussion occurred.
Faith, divine unity, prophethood and religious duties were part of the Companions' religion. The historical question is when and why a separate disciplinary structure was subsequently developed.