minecraft:village/taiga/town_centers/taiga_meeting_point_1 contains a bounding box that is too short for the iron golems/adult villagers to generate and also extends further outward than expected, preventing the houses from generating. Attached is an image showing this structure (left) and a corrected version (right). Some of the paths also share this same issue.
Steps to reproduce
Summon the following structure block:
/give @s minecraft:structure_block[minecraft:block_entity_data=\{id:"minecraft:structure_block",name:"minecraft:village/taiga/town_centers/taiga_meeting_point_1"}]
Load the structure and observe the bounding box
Please check if this is still an issue for you in 1.16 Release Candidate 1 or later.