I have the SCM2T3-G40 Orico aluminum enclosure. Combined with 1TB Samsung 970 Evo Plus I get about 2700R/800W with Amorphous on Mac M1 mini. I get almost the exact same results on a Windows machine with CrystalMark, so it doesn't seem to be a MacOS problem but rather some compatibility issue between Orico and 970 Evo Plus.
I also tried the Kingston KC2500 SSD with the same enclosure, and got about 1200 on write. Better than the Samsung, but still far short of the actual write potential. When paired with the Kingston drive, the enclosure is merely warm and not hot to the touch as with the Samsung drive.