The biomes from Java 1.18.2 and 1.18.20.30 match consistently for 64-bit seeds in the overworld only.  However, biomes in the nether in Preview 1.18.20.30 still match the old 1.18.10 bedrock biomes and do not match the nether biomes in java edition. 

Steps to reproduce:

The attached screenshots are from identical places on seed 5446408133286986968 on both 1.18.20.30 bedrock and 1.18.2 Java.