So, as a preface I'm pretty sure this isn't possible in the manner I'm looking for. I've done a fair amount of searching and the closest option I've found is creating a line with the pen tool and going to Layer > Expand stroke before doing division.
I'm transitioning from Inkscape to Affinity Designer. In Inkscape you can use a line, of any stroke thickness, to divide an object. It will not affect the gap, it will simply divide the object from the center of the line (desired behavior in this case).
In Affinity I'm left with a gap the thickness of the line (undesired). The only way I've found to achieve the desired affect is by dividing with rectangles that have no stroke which is a more tedious process.
Am I missing something or am I correct that the line tool will not allow me to perform divisions like it did in Inkscape?
This is how it looks when done in Affinity:
This is how it works in Inkscape: