The first image was taken with built-in connected textures resource pack and Glowing OF. The regular blocks on the left have emissive and connected textures while Sable blocks on the right don't.
(using neo-forge 1.21.1 with Sinytra Connector and Forgified Fabric API)
If that somehow helps, Fusion mod works perfectly fine. The second image was made with Fusion Emissive Ores and Fusion Connected Glass.
The first image was taken with built-in connected textures resource pack and Glowing OF. The regular blocks on the left have emissive and connected textures while Sable blocks on the right don't.
(using neo-forge 1.21.1 with Sinytra Connector and Forgified Fabric API)
If that somehow helps, Fusion mod works perfectly fine. The second image was made with Fusion Emissive Ores and Fusion Connected Glass.