I very much strongly suggest that good bunny hop technique is very much applicable to good jumping technique (pumping technique too).
However a strong starting point, as suggested earlier is simply correct speed combined with a central, strong body position, with minute adjustments in the air to keep things smooth. So no absorbing of the lip, no pumping, purely going off the kicker and learning what happens as you go off varying kicker shapes. To add extra at this point would simply over complicate things.
Then, once you’re more proficient, good jumping/pumping is purely modifications in the timing of a good bunny hop, of which you can’t learn until you understand what is happening as a bike goes off of a take off.