When you try SSD enclosures under three different operating systems - Linux, FreeBSD and Windows - or different distributions and they all behave the same way, when you tell them it’s not only one enclosure but four of them, when you tell them that those same enclosures work perfectly fine on different machines under the same operating systems, you simply can’t reason with these people as they ignore any technical or logical argument that goes against their work assignments.
Not only that the response is strange and disappointing, it is the typical response of manufacturers that simply wash their hands and put the blame on third parties.
I’m sure that their support staff can find a USB4 / Thunderbolt enclosure or two and do the necessary tests in one hour, but they will never do that, it’s much easier for them to give you that kind of answer that masks their indifference under fake politeness.
I bought the Framework Desktop because of their supposedly very good Linux support compared to other manufacturers of similar machines. That proved to be utterly false.