You should not be forming a burr when stropping. If you were to however, it would form on the opposite side but again, you should not be forming one at all.
You cannot strop a knife into sharpness.
Stropping can be controversial but most see it as either a method to remove the slightest remaining burr left from the actual sharpening and/or as a method to highly refine the already sharp apex.
As
@DeadboxHero so accurately says, strops enhance but they do not create.
I personally am in the both camp - I strop to ensure burr removal and enhance the edge. I also strop for maintenance but that's a separate discussion.
I think the common thing is to put your compound of choice on the rough side of the strop and leave the smooth side bare. The rough side should do the de-burring and the smooth side the apex refinement. There's no hard rule here though.
I do not increase the apex angle for burr removal. You should be able to remove the burr at the same angle you sharpened or really close to that anyway. Increasing the angle is putting another bevel on the edge. The roughness of the strop will do the work.
If you don't already have one, I highly recommend you get a 10-20x loupe. A lighted one is better but not necessary. Don't guess at what is happening, see it. Use a marker to mark the edge of your knife and sharpen until the marker is full removed and you can see and feel a burr on the opposite side. Some steels can have a very slight burr that is hard to see but you should feel it. Then do the same on the other side. The I like to do alternating edge-leading,
very light strokes on the stone for burr removal. Same angle as the sharpening angle, real light, five or ten times.
Then very light edge-trailing on the strop, maybe 1-3 times. Same angle as the sharpening angle.
You could be rolling wire edge (burr) back and forth or rolling your apex over or you might not be sharp off the stone. And don't move up in grits until your sharp off the first stone you start out on.
There's not a lot of info to go on, but the fundamentals are the same.