Is there a way to allow for the msg. / flow. / global. input types for subflows?

Hi @MrRosenkilde, as Nick has stated, by design this is not possible with subflows. I use another node that gives you subroutine like functionality where you can pass values in via msg, flow, global etc. I provided some feedback here when another user raised a question on its usefulness.

Its not quite a subflow but perhaps it will work for your current requirement?