Style elongation happens before filament elongation in the Schotia afra var. afra flowers in picture. Both these events take place once the male and female floral components burst through the petal tip covers.
Both styles and filaments turn pale after their elongation. So do the petals that go pinkish as the corollas mature. Anthers appear yellower on the young flowers, browner when mature and tall. And the styles veer sideways, separating from the stamen bunches that rise erectly.
Maybe insects read these colour coding and related signals for estimating food availability in different age flowers (Venter, 2012; Coates Palgrave, 2002; iNaturalist; https://www.worldfloraonline.org).