I want my tiny coal without a separate mod for it

Due to the way vanilla does burntime (and how Forge and Fabric change it, respectively), this will require an update to Architectury API, feel free to track architectury/architectury-api#37 for updates, but it's rather low-priority for now

An update on this: architectury/architectury-api#81 is about to merged, so this will probably be added soon ^^

Should be implemented in the newest build, use item.burnTime(Number) during registry / modification ^^