Deepslate Copper Ore doesn't generate naturally in 1.18 beta

In the latest beta of beta 1.18.0.21, the ore distribution has changed for copper ore to match Java, which means it can generate below y=0 to y=16. However, when exploring and removing all deepslate around, deepslate copper ores don't seem to generate at all.

Like MCPE-143902, this is most likely because the replace_rules doesn't include the deepslate block to be replaced by.

Step to Reproduce
1. Go below y=0 on deepslate layer (preferably in a dripstone cave).
2. Try to clear the deepslate and tuff around using these commands, and put it on a repeating command block:
/execute @p ~~~ fill 10~10~10 _-10-20-10 air 0 replace deepslate
/execute @p ~~~ fill 10~10~10 _-10-20-10 air 0 replace tuff

Observed Result
No deepslate copper ores can be found.

Expected Result
Deepslate copper ores can be found.