This datapack changes temperature noise value to the highest so Minecraft generates only hottest biomes.
Biomes shown in the list weren't chosen manually, these are the biomes Minecraft generates when temperature is the highest.
List of biomes that can spawn in this world
Ocean biomes
Mushroom Fields, Warm Ocean
Coast biomes
Stony Shore
River biomes
River
Regular biomes
Windswept Savanna, Desert, Eroded Badlands, Badlands, Wooded Badlands, Mangrove Swamp
Cave biomes
Lush Caves, Dripstone Caves, Sulfur Caves, Deep Dark
The datapack also changes or deletes some advancements so all vanilla advancements are achievable (26.2 only feature).
Changes to advancements
Nether tab
Changed advancements
How Did We Get Here? (Conduit Power, Mining Fatigue effects are not needed)
Adventure tab
Deleted advancements
Heart Transplanter
Is It a Bird?
Sound of Music
Changed advancements
Monsters Hunted (Creaking, Elder Guardian, Guardian are not needed)
Smithing with Style (Vex, Tide, Wayfinder armor trims are not needed)
Adventuring Time (all biomes that don't generate are not needed)
Husbandry tab
Deleted advancements
Whatever Floats Your Goat!
The Whole Pack
Changed advancements
Two by Two (Fox, Goat, Llama, Ocelot, Panda, Turtle are not needed)
A Balanced Diet (Sweet Berries are not needed)
Fully compatible with all of my worldgen datapacks here excluding I love frozen biomes for obvious reasons. Advancements changes aren't compatible though.
