This is cool and a nice writeup but - Liquid Glass is the totality of the design language, including elements close to one another merging together meta-balls like, the different tinting/clear modes, the controls being on a distinct layer from the content...

This is "just" a glass shader.

That merging can be done with another, much simple filter and people have been doing it for years. It has been called the "Goo" filter.

Here is an implementation: https://codepen.io/lenymo/pen/pJzWVy