Is there a way of styling the BS4 headerCols to a fixed width while maintaining a responsive width for the input field?
In my example below I want to have the inputs start on the red line no matter how wide the screen is.
In BS4, you can control the width of columns by setting the headerCols and valueCols properties. This may be enough to solve your issue.
If not, you may need to use separate controls for the label and the input. The FlexBox control can be very helpful in complex layouts.