Let's ask us the question: Should Framework claim that this SSD is compatible with their laptops? Personally, I think it would be misleading if Framework sold an SSD, claimed it was compatible with the Framework laptop, but you had to buy a third-party adapter to get the SSD to fit. That's the sense in which the SSD is not compatible with the laptop.

Luckily, Framework sees things as the same way as me, hence the compatibility warning.