Lucienne (5700U/5500U/5300U) are the only Zen2s in the 5000 series at present (afaik), but AMD continues to re-use the Zen2 architecture in the 7000 series (7520U, etc), as well as many semicustom products like Steam Deck.
It's in rather a sweet-spot as far as performance-power-area, so this isn't entirely a bad thing. Zen3's main innovation was unifying the CCXs/caches, but if you only have a 4C, or you want to be able to power-gate a CCX (and its attendant IF links/caches) down entirely, Zen2 does that better, and it's slightly smaller. We'll be seeing Zen2 products for years to come, most likely.
It's in rather a sweet-spot as far as performance-power-area, so this isn't entirely a bad thing. Zen3's main innovation was unifying the CCXs/caches, but if you only have a 4C, or you want to be able to power-gate a CCX (and its attendant IF links/caches) down entirely, Zen2 does that better, and it's slightly smaller. We'll be seeing Zen2 products for years to come, most likely.