Huh? I've never seen Airflow described as no code or tried to sell itself that way, in fact all the pipelines are written in python and you can do some really complex orchestration.
I get you're not saying Airflow is no code but that the category you've put it in is typically low code or marketed as low code, but then I don't think Airflow belongs in that category or rather, and maybe more accurately, no/low code is not really a major defining quality of the bucket you're calling "Process Designers".
I've also been calling them "Process Schedulers" because typically it involves translating a more manual, but well defined process into it's automated phase.