This bug report is a parity issue with Java.

Summary:

In Java version, copper oxidation is now a random tick effect and thus affected by the randomTickSpeed ​​gamerule. In the bedrock version, the randomTickSpeed ​​does not affect copper oxidation.

Steps to Reproduce:

1. Place copper blocks.
2. Set the randomTickSpeed ​​rule to maximum (4096).

Observed Results:

Copper will not oxidize.

Expected Results:

The copper will oxidize. (in the Java version, with the same value (4096), copper will oxidize in the first steel already in the first minute)