Dual power supply with BJT. How to do tracking without opamp?
simulate this circuit &ndash; Schematic created using CircuitLab

For a tracking circuit without opamps, try something like this. The change is to make Q4 compare the midpoint of the two outputs with ground, so its emitter needs to be biassed one diode drop ABOVE ground. (Eliminate R9 and U1)

I also recommend replacing the pass transistors with something slightly bigger - BD139/140 are suitable.