In my opinion, in this case, how the colors look in highlights is very dependent on the correct white balance.
The second aspect that plays a big role is the treatment of highlights before they are taken over by tone-mapper.
Regardless of whether they are treated by filmic or sigmoid, in both cases they should be brought back - as far as possible - from the area of high compression to preserve the details and colors. This can be done with tone equalizer.
After that, the only question is which specific settings are important for each tone-mapper.
Filmic offers different modes for preserving chrominance, which can be advantageous depending on the scene.
In my experience, if you do it without these modes and adjust colors and contrasts with the color balance module, you will get good results very quickly.
Sigmoid has good contrasts from the start, especially in the mid-gray area, which need only minor adjustments. The color preservation is also good. Nevertheless, there is no way around making fine adjustments in the color balance module. In this case, I had to reduce the color saturation in highlights.
filmic:
P5020458_filmic.ORF.xmp (11,9 KB)
sigmiod:
P5020458_sigmoid.ORF.xmp (15,2 KB)
One more important note regarding this scene: be careful not to distort the brightness ratio in the scene. If the woman is illuminated by direct sunlight and the child is in the shade, they cannot be similarly bright. If you brighten the child too much, the scene will look unnatural.