In the Creative inventory, mangrove planks products such as the block itself, planks and fences come directly before the nether wood versions. However, stairs do not seem to follow this, instead being placed considerably after them.
- Open the Creative inventory to Building Blocks
- Locate mangrove stairs
- Locate the two nether wood stairs
Mangrove stairs would come directly before crimson and warped stairs.
They appear several lines later.