Agree with this, most prebuilds that meet the budget of the average consumer allowance offer 4060 as the base level GPU, switching to a Radeon product needs to be done manually or isn't an option.
Part of this reason is AMD (with this current gen) scalped consumers by making their cards a tier higher than they should have been. A 7600 doesn't really compete with a 4060, and the price difference isn't enough, people know the 4060 is faster and that's all they need to know, had the 7700 been labelled the 7600 more prebuilds 'might' have the Radeon as the default choice but I highly doubt it, the reason being the average "gaming" consumer, which lets be honest is majority teenagers only knows of Nvidia being the best. And they havnt heard of AMD
Example, my colleague at work is looking at upgrading his son's pc for Xmas, it has an 11th gen intel, and is currently still rocking a 980ti, his son has asked for a 4060ti, I said have you looked at AMD as an option, he asked who's AMD?
Anyway after I scouted around, the price of the 4060ti and the 7700xt were very similar and the performance is pretty much the same also, certainly at 1080p which his kid needs.
With the pricing so similar you wouldn't choose the AMD card over Nvidia, and the next tier up is a chunk of money more