The most important tip when climbing stairs is to drive at an appropriate speed. If you start too fast, you risk a flat tyre. Apart from that, you'll lose the momentum you've built up anyway if you thunder against the steps with too much throttle. You get the right amount of motor power with every step.
Rolling, surfing, dropping - there are many ways to master stairs. The simplest is rolling.
TIP: Direction of vision: The direction of vision is particularly important for all stair and step moves. Do not point directly in front of the front wheel, but a few metres ahead. This stabilises you and gives you confidence.
If you have a modern Bosch drive with Extended Boost mode, you have an advantage with this move. The targeted coasting supports the jump to the next level. For other drives, it is advisable to use the highest possible support level.
You also need the drop technique in practice on the trail all the time. It helps you avoid falling over the handlebars. A certain basic speed is important. With an E-MTB, you can build up enough momentum with just half a turn of the pedals. In this case, it's not just about a simple drop, but also about a slight lateral movement.
TIP: Platform pedals have advantages when practising these moves. Not just so that you can quickly take a foot off the pedal. But above all because with clipless pedals you are easily tempted to cheat and pull on the pedals. This is counterproductive for your riding technique.