I don’t know why kicad have jumpers when it is so difficult to implement them. I have an idea which may work but have not tested it yet.
You take 1 jumper, say a solder jumper, and connect one end to a track from, for example, an op amp output. This is the solder point at this end. The other end of the jumper is not connected because this is attached to the jumper wire. Then the connecting wire at the other end is connected to another jumper. Again one end is left unconnected and the other end is connected to a track from perhaps another op amp. This then is the solder point at the other end.
Each unconnected end of the jumper can be referenced the other end of the jumper wire using the component editor.
If you only use 1 jumper you are going to have to draw a track on the schematic which will later be seen as a track on the circuit board.
In all of the above I am referring to using a jumper on the schematic.