This mod's modrinth page does has a 1.21.1 version, please update the mod description to use the legend and specify a mod version for 1.21.1

"The image Will be added in the future", it will be added when there are enough mods and If you look at EveryCompat's page, it has a image using the LEGEND.

anyone should be able to figure out which version StoneZone is available in. it's only available in 1.20.1 for now.