The Exosphere Generation 2.2 datapack adds nether-like features to old_growth_spruce_taiga:
exosphere:delta— basalt delta with magmaexosphere:small_basalt_columns+exosphere:large_basalt_columnsminecraft:lake_lava_underground+minecraft:lake_lava_surfaceminecraft:ore_magma+minecraft:spring_delta
This datapack that overrides the biome definition with all basalt/lava/magma features removed.
All of exosphere's tree and vegetation improvements are preserved — only the nether-like generation is stripped. This only affects newly generated chunks; existing terrain won't change.

