I tried it several times now in the 1.15.2 because it said that it brins the bug from 1.12.2 back for newer versions, but it did never work. After I saw that the rule is named y0DragonEggBedrockBreaking I thought that it is a fix for the 1.12.2, that you can break the y0 Bedrock with dragon eggs too. In the Description of the carpet rule on the carpet extra page (https://github.com/gnembon/carpet-extra) it says: "Reintroduce Dragon Egg Bedrock breaking bug from 1.12". So it would be nice if there is actually a rule which makes the bug from 1.12.2 work in never versions again.