No, apparently not yet. However, there are two methods:
We can parent multiple schematics into one folder.
We can have Schematic A, B, C, and D, and parent B, C, and D into schematic A.
Technically they aren't called "1 schematic", but it still works nevertheless. Moving the parent or changing its values will also affect its children.
If you want them to connect to one another, adjusting the position of the schematic aligning with the other blocks still works.