No the apis to customise it, things like tint or background color, certain container values like padding and corners, animation, etc etc.Is that just because it’s beta? Why would Apple try to prevent using Liquid Glass? I’ve seen an app in TestFlight that is redesigned with LG.
They did the same thing with navigation controller apis because they wanted ui to be consistent, but of course plenty of apple apps magically had different designs which made use of the private classes, which the rest of us are not allowed to use.
A small example. The new floating tab bar. There is a new container which is private, where you could change the background color to let’s say match brand design, or heck I donno - make it less impossible to read stuff - but it’s a private class. It’s totally possible to customise these things, but if Apple finds the code you risk a ban