Build shaders

By default, Unity strips shaders variants that aren't used in any scenes. This can exclude variants that are only used in AssetBundles. To ensure that certain variants are not stripped, include them in the Shader Stripping properties in Graphics Settings.

For example, if you have Addressable assets that use lightmap-related shaders such as Mixed Lights, go to Edit > Project Settings > Graphics > Shader Stripping and set the Lightmap Mode property to Custom.

Quality Settings also affect shader variants used in AssetBundles.