That doesn't make sense to me. Both Tasha's and Rising reference Xanathar's for the Artificer spell list, Forge supplements Rising, and the 2024 classes have access to Xanathar's spells without issue. Plus, 5.24 promises backwards compatibility.
D&DBeyond haven't brought the spells from Xanathar's to the new Artificer yet while they did so for the rest of the spells for that class. Give it a bit.
I'm hoping Artificers, or at least the Artillerist subclass, gets proficiency in martial ranged weapons. Going by the preview from the book, it would be weird for that subclass to use Arcane Firearm on these weapons and not be proficient in a gun or a bow.
My sibling and I suggested making the Kender culture have a "share and share alike" mindset. It seems to work wonders. I'm thinking of having their culture encourage curiosity to further lengths compared to other species in the setting.