The Android and iOS versions of the “Google NotebookLM” app now allow users to customize their “Slide Materials”. This update comes after a previously announced rollout plan and is part of the expansion of the “Studio” features, which also include support for customizing “Infographics” and planning for “Video Overview” generation in the future.
Source: https://jetstream.blog/en/android-ios-notebooklm-slide-deck-customization