I bought another block of Paduk at Rocklers today, and it just had the
ends covered in wax. Just wondering how long to let it just sit to
slowly dry out and stabilize? Can't remember if I asked this question
before, so apologize if this is a repeat. Thanks.

Rule of thumb, 1 year per inch of thickness.
Have drying it in the microwave?
That would speed things up considerably.
Maybe 30 seconds on high, then 10 minutes or longer outside.
Maybe others here have tried it and can give better advice.