Just for the record: I have two different USB C to NVMe enclosures with different chipsets, one is crap, one is great:

• Crap: Icy box IB-1817M-C31 with with JMicron JMS583 PCIe-USB Bridge Controller chipset: read stalls (not so much when writing, though), no S.M.A.R.T. support, no M.2 SATA support -- AVOID
• Sabrent EC-SNVE 10Gbps Tool-Free Enclosure with Realtek RTL9210 chipset: performant, with S.M.A.R.T. support, supports both M.2 SATA and NVMe, and the tool-free approach (i.e. no screws) is also nice, even though the case is smaller, it gets less hot then the other one (which could either mean that the heat transfer from the SSD to the case is bad, or that the bridge controller chipset gets less hot) -- RECOMMENDED

But it seems that firmware versions matter a lot. But Sabrent has only an updating tool for Windows, maybe these images can be used as input for some Linux-based tool?