Unlikely. Frosted glass blur was introduced almost twelve years ago in iOS 7, and was supported all the way down to the iPhone 4. Many apps like control center have used a full screen blur without any performance issues for a long time.
Apple at the time created their own 'approximate gaussian blur' algorithm specifically to enable this, and it ran crazy fast on devices where a simple gaussian blur would barely achieve double digit FPS. Even if this 'liquid glass' effect is heavier to compute, on the hardware we have today it will be a negligible performance concern.
Apple at the time created their own 'approximate gaussian blur' algorithm specifically to enable this, and it ran crazy fast on devices where a simple gaussian blur would barely achieve double digit FPS. Even if this 'liquid glass' effect is heavier to compute, on the hardware we have today it will be a negligible performance concern.