Since there's no altar or Temple, laws about red heifer don't apply directly, but we can still learn from them. However, the whole red heifer deal doesn't make a lot of sense. Why a heifer? Why red? What's up with the ashes? God said what to do, but not why. There could be any number of reasons for this. Here are 4 possible explanations...
https://soilfromstone.blogspot.....com/2017/06/about-t