One of Glimmer DSL for LibUI’s greatest assets is that it renders native GUIs on every platform. That said, there might be cases where there is a need for non-native GUI controls like needing to render very large GUI controls for people with vision disabilities and the elderly or needing to build applications with brand new visual concepts like traffic control management apps and diagramming tools. Thankfully, the majority of native GUI toolkits offer non-native control support too, and Glimmer DSL for LibUI is no exception!

https://andymaleh.blogspot.com/2022/01/glimmer-dsl-for-libui-non-native-custom.html