Radio luminosity of high-z quasars at 144 MHz as a function of their redshift. The grey band indicates the 5σ detection limit range of LoTSS-DR2 (16th to 84th percentile) and the filled blue circles are quasar detections at a > 2σ level. The triangles indicate 2σ upper limits for quasars with < 2σ detection. The black circles show the median stacked radio luminosity when stacking all quasars in redshift bins from z = 5 to 7.0 in steps 0.5. The average 2σ threshold is given by the red dashed line.