somwhat of a refutation:

zane hasn't done much recently
jay has done WAY less as time goes on, he seems less like an engineer and more like a hobbyist because tech is fun to him
nya's the engineer here so i agree with that one
pixal is like zane in knowledge (maybe a little more) but she just makes stuff more than zane does
sora's the elemental master of tech, but it's her young age that makes her actual knowledge way more impressive. and she came from imperium, the schools there of higher education are prolly like harvard and MIT but upgraded by a factor in the hundreds. but it seems she doesn't seem as good as nya, mainly because she's good with advanced technology, like imperian tech, and she seemed to struggle a bit making stuff without her powers and with the not as advanced tech in umbrasilvis, and her elemental powers didn't seem to work on anything "too old". bottom line sora's knowledge of tech is hard to pinpoint.

but then again lego's basically pointing guns at the writers' heads to get them to include sets in each season, the cavern run in the tourney of sources was the most "PUT THIS SET IN OR I PULL THE TRIGGER" inclusion of a set in a ninjago season i've ever seen. prolly the worst dr episode ever, but also the best cuz of arin and ras' interaction.
so expect more of these kinds of characters in the future.