AMD has never done that for an entire lineup, but AMD has released plenty of rebadges sprinkled through their mobile lineup - arguably even worse for the unsuspecting buyers. This is why as annoying as their new mobile naming strategy is (like 7840 with the 4 standing for generation) is actually an improvement.

For example, AMD mobile 5XXX series contained a mix of Zen 2 and Zen 3 parts. For example, the 5500U is a Zen 2 part (but the 5500H is Zen 3). The 5700U is Zen 2 (but the 5600U and 5800U is Zen 3).

This isn't to defend Intel - this launch is pretty bleh.