You need to be looking for the flowers much earlier....maybe even before the leaves have opened.
You still don't seem to have got the hang of this.
I will try to keep it simple.
ALL plants produce flower.
Some plants can take 100 years before they produce flowers.
FIRST come the flowers .
Sometimes with male and female "bits."
Sometimes they only have male flowers...which carry the pollen on the anther, part of the a stamen.
I remember it as STAMEN = MALE.
Sometimes they only have female flowers...this has something called a stigma to catch the pollen from the male part.
I remember it as STIGMA = MA ( short for mother)
Only after the female part has been fertilised by the pollen from the male do you get a berry eg honeysuckle/or hard nut eg Horse chestnut/ or a seed capsule like a pepper pot eg Poppy / or a fruit with the seeds inside eg apple/ or grass type plant eg wheat /or a winged seed eg sycamore. etc.etc.etc
Some flowers die after they have produced seed.
Other flower and produce seeds every year.
P.S. Not all flowers are pretty with coloured petals....some like the Titan lily are weird and wonderful...and stink
https://en.wikipedia.org/wiki/...
See David Attenborough's video.
https://www.youtube.com/watch?...
https://www.google.com/search?...