This includes the following models:
cube.json
cube_all.json
cube_bottom_top.json
cube_column.json
cube_column_horizontal.json
cube_directional.json
cube_mirrored.json
cube_mirrored_all.json
This means that alphabetical sorting results in these being separated from other template models, which is less than desirable, and does not immediately indicate that they are templates in the first place, which can cause confusion (e.g. there does not exist a block called minecraft:cube).
Linked issues
Comments
Can confirm in 21w05b.
Confirmed for 1.17.1.

cross.json and related models have been split into MC-236458.

crop.json has been split into MC-236461.
Can confirm.