The following items are missing following item tags:

Sky Bronze Ingot: c:ingots
Sky Steel Ingot: c:ingots
Sky Osmium Ingot: c:ingots
Sky Bronze Block: c:storage_blocks
Sky Steel Block: c:storage_blocks
Sky Osmium Block: c:storage_blocks

-Neoforge, 1.21.1

Thanks for the heads-up. In the coming few days I'm going to be doing a fair bit of catch-up work in general and make sure this is also resolved.