I’m going to make a suggestion that I may actually try out myself…
Assioma pedals use Xpedo Thrust NXL pedal bodies. I’m not sure if it is standard or slightly altered to accommodate the thin part of the pod that butts up to the body.
All Xpedo pedals use exactly the same bearings in a 1 outboard, 2 inboard arrangement with a nut screwed onto the end of the spindle to keep everything in place. Assioma’s bearing kit looks to be the same.
I can’t be sure that the spindles will be compatible but I may well splash out on a set of M-Force spindles (£20) to test out the theory. If it works the Xpedo SPD compatible pedal bodies should fit on the Assioma spindles and hey, presto, a pair of SPD power meter pedals.
It’s a shame that the pod sticks out beyond the end of the cranks which makes them vulnerable for proper mountain biking but they could be good for gravel use.
Not sure that the clearance to the pod will be like or whether they’d still be accurate. Who knows, but it may be worth a test.