My MacBook Pro won't wake up after sleep mode since installing Catalina update

I had the same problem. I tried formatting the hard drive and re-installing Catalina. It kept doing it. In the end I re-installed Mojave from my backup. Will wait until Catalina is fixed before upgrading. Besides nothing in Catalina is of any significant value in my eyes.

Just another user like you

DB

I concur - came to the same conclusion after Crashalina destroyed 2 brand new 2019 $4500 Mac Book Pros and paralyzed my 2014 MB Pro for the last week. Time Machine was also rendered useless. Thank God I backed up my most important data in two clouds and manually in yet another hard drive! I was, however, unable to do anything with the brand new machines after the initial update and was forced to return both 2019's to Apple. Before trading my 2014 in on a new MB Pro (from a reputable out-of-state retailer and for $250 < sticker price and no sales tax), I was finally able to wipe its memory clean and successfully re-install Mojave 10.14.5. I would have kept her, but needed the faster i9 and Vega 20 for both current and future work-related graphics presentations. The fact that so many of us have been left adrift for weeks by Apple has been greatly unsettling and absolutely unacceptable. I'm waiting until March before I reassess the situation and even think about putting my family through another round of Crashalina!

Mine as well. But after updating to 10.15.1, the issue is resolved. Hope this helps.

JH