I see system76 is doing something similar for their PopOS?

https://store.kde.org/p/1327259 / https://github.com/pop-os/icon-theme

It uses a semi-flat design with raised 3D motifs to help give depth to icons.

I remember Noia, they were too 'shiny/glassy' and 'playful' for me. Looked different and funny for a while, but unusable for daily driving. I prefer something more 'serious', unobstrusive, not distracting.

I see someone did a Noia KDE Reloaded in 2019: https://store.kde.org/p/1293856

For shiny things, these did work for me, for a while, or could, if I retried them again:

Faenza https://store.kde.org/p/1012545 ,

Faience https://store.kde.org/p/1012543 ,

Meliae https://store.kde.org/p/1012498 ,

Delft https://store.kde.org/p/1199881 , https://www.opendesktop.org/p/1169579 ,

but I'd rather go to something like Flat Remix instead.

https://store.kde.org/p/1012430 , https://drasite.com/flat-remix ,https://github.com/daniruiz/Flat-Remix

Hedera would look good, too, if not abandoned: https://store.kde.org/p/1207800 / https://gitlab.com/sixsixfive/Hedera-icons

If they were as comprehensive & complete as Breeze I'd go for Retrofukation https://store.kde.org/p/1012499 or IndigoMagic https://store.kde.org/p/1015788 instead.

But they aren't. So Breeze it is, which is bliss...