On Minecraft Bedrock, I've noticed that addons with custom blocks no longer show up in creative or survival inventory, despite efforts. It's rather all addons even with their respective behavior packs if they have one, custom blocks don't show up anywhere in the inventory. There's only one way to obtain those blocks and it's through commands, but the purpose of most addons isn't this.

Below, a screenshot is shown of a custom block that doesn't appear in the inventory despite attempting to search for the exact same block. After request, the addon used in the game is also attached below.

Steps to Reproduce:

1. Get any addon that has custom blocks and enable their respective resource and behavior packs on the world.
2. Launch the world along with the addon that has the custom blocks.
3. Observe the entire creative inventory and use the search category first.

Expected Results:

The custom blocks should be anywhere in the creative inventory and if they were specified, for example inside a specific category or even a group, they should be present regardless.

Observed Results:

The custom blocks don't show up anywhere in the creative inventory, even when searching them. They also won't show up if the addon specifies them inside a specific category or group. Only way to obtain them is the usage of commands.