Firstly, tech of any sort is almost unavoidable in anime. It's just a matter of whether said tech is a significant part of the world-building or just there to k

Firstly, tech of any sort is almost unavoidable in anime. It's just a matter of whether said tech is a significant part of the world-building or just there to keep the plot moving. Even a sword-and-sorcery shoujo isekai like Escaflowne has mech battles. Secondly, I've watched many of these shows myself, so when you mentioned Knights and Magic (which I enjoyed when it came out in 2017), I knew the kind of premise you were looking for; Coder/office worker/intelligent & talented student uses his knowledge of the laws of nature of his previous world to become overpowered in the new one.