It is an ACASIS enclosure, got it from german amazon but I do not know where you live.
40Gbps NVMe M.2 SSD Enclosure ANYOYO
www.amazon.de
There are also other enclosures people managed to make work in this thread, but this one has worked well with an ssd I could find second hand cheaper. In general nobody knows why, but there are combinations that work and others that do not work, the same enclosure can work with an ssd model and not with other while the ssd models can work or not with another enclosure, it looks like a mess. Even some people may have failed to reach these speeds with this combinations, and it may depend on the serial number of the SSD. Also, while it supports 2T SSDs, people seem to have been able to make it work on these speeds only with SSDs with 1T or less.
Also, I am unsure how much of a difference in speeds would be noticeable in practice tbh compared to a USB 3.2 gen 2 one, but in the future I would like to make it bootable with linux, so I wanted to spend my money wisely on that now.