Did i screw up my chances on finding a woodland mansion please help

(Xbox one) Ive explored 5 maps so far and ive not found a single mesa or woodland mansion. World size is large, but the biome size is small (balanced seed too cuz it promised it would give me greatness)....... ive put so much effort into this world already did i screw up by not leaving the biome size at medium or large?? I just wanted more biome opportunities :(

Would a woodland mansion even spawn on small biomes...? And if not is there somehow something i can do to up the biome size after world creation....... i need mesa and woodland mansion :(

Hell i havent even found desert temples yet oh god