In the 1.18 experimental snapshots, those other strips generated. However 21w37a did not include those and did not mention them at all in the changelog. This seems like a strange decision, as unlike the mob spawning based on block height and elytra changes, the stone strips did not receive any criticism.

Expected Result

The strips of Granite, Diorite & Andesite would generate on Stone Shores & Stony Peaks