@Archimago posted a set of measurements of the new Topping PA5 mk II (https://archimago.blogspot.com/2023/10/part-ii-topping-pa5-mk-ii-plus-pa5ii.html), and by eyeballing it I'm guessing it's using the new TPA3223 (https://www.ti.com/product/TPA3223), although with a lower than maxed-out power supply.