Ruin Explorer
Legend
The lore in VGtM and MToF is not FR specific. Most notably, the gnoll and elf lore directly contradict FR lore that came before, and there are quite a few examples of less extreme contraditions/retcons in the other sections. Most of the lore in those books is setting-neutral, with examples/exceptions noted in the text. The only major FR-specific lore that infused an entire section (and isn't just an example) is the Ordning in the giant section.
I don't think contradicting or changing past FR lore without calling out FR lore as different can be said to suggestive that this isn't treating FR as the default. FR lore changes every edition, and retcons and apparent contradictions of previous lore are a constant.