Basalt only generates in the first 4-5 top layers of the Basalt Deltas biome and is then replaced by Netherrack. Below the surface, Basalt block do not generate even though it is in Basalt Deltas biome.
MCPE-222016
Basalt generates only on the few top layers in Basalt Deltas
Resolved
Duplicate
1
(Unassigned)
Unconfirmed
Multiple
Windows 11 24H2
1.21.100.20 Preview, 1.21.84 Hotfix, 1.21.82 Hotfix, 1.21.81 Hotfix
Retrieved
This issue will not be fixed, see MCPE-100665.