You'll need iOS 26 Beta installed on your iPhone to access Liquid Glass icons. Since the feature is currently only available in the public beta, you'll need to download that version first.

Transparent icon look in iOS 26: Apple adds "Clear" to light and dark Apple's new, glassy look can also be extended to iPhone icons. Fortunately, this is purely optional, because the overview suffers.

Menus become contextual and buttons hide away when not needed. And yes, if you want, you can make your icons all clear. Which, admittedly, I think is neat and I will absolutely be doing that.