This mod adds back the "bug" that caused the end rings to exist. The "bug" was removed in version 26.3 snapshot 6 of minecraft. It does this by changing the world gen of the end. Compatibilty problems are possible, though I have not yet found any. This command should bring you to the first end rings if executed: /execute in minecraft:the_end run tp @s 370720 75 0

==================== Compatibility issues

• c2me: you can make it work again by going into c2me.toml in the config folder and finding this:

    [vanillaWorldGenOptimizations.nativeAcceleration]
        # ================================================================
        # (Default: false) Enable the use of AVX512 for native acceleration
        # 
        # Currently, AVX512 implementation is generally slower than AVX2 implementations.
        # If you ever decide to enable this, make sure you have verified that
        # AVX512 implementations are faster on your machine.
        # 
        allowAVX512 = "default"
        # ================================================================
        # (Default: true) Enable the use of bundled native libraries to accelerate world generation
        # 
        enabled = "default"

then you have to set the enabled = "default" to enabled = false. it should look like this:

    [vanillaWorldGenOptimizations.nativeAcceleration]
        # ================================================================
        # (Default: false) Enable the use of AVX512 for native acceleration
        # 
        # Currently, AVX512 implementation is generally slower than AVX2 implementations.
        # If you ever decide to enable this, make sure you have verified that
        # AVX512 implementations are faster on your machine.
        # 
        allowAVX512 = "default"
        # ================================================================
        # (Default: true) Enable the use of bundled native libraries to accelerate world generation
        # 
        enabled = false

then it should work again