I have attempted delosperma extractions dozens of times, often with rather large amounts of material, not only did I never get any DMT or 5-MeoDMT, when I defatted I got nothing, while when I did not I got an oil residue with mild mesembrine like activity that may have had hordenine in it as well.
I hesitate to say delosperma is a dead end, but there is something incredibly tricky about this genus.
Also, defatting is associated with decreased yield of several alkaloids.
I do not want to dig through the literature to demonstrate this, but maybe I will get around to it.