ECC is not supposed to be different between Pro and non-Pro CPUs. The official AMD spec site has been linked here a hundred times already.
Despite that Framework’s position is that it’s 100% not gonna work on the 7040 non-Pro models.
Not: we’re working with AMD to improve ECC currently not working.
Just flat out: it’s 100% not gonna be available. link
Yes, it could be a situation like with the AM5 platform where broken ECC gets fixed over time. But I don’t see any effort from Framework to add ECC support. And I am not gonna buy a Framework laptop just to test. I was wise to not preorder.