I have the same problem since the last OS update. I have a brand new MBP16 Core i9 with 32GB RAM that worked well for about a month until the latest OS update.
I wrote to Apple and I am sending them the crash reports every morning, but I haven't heard back from them yet. Reminds me of the nasty PC/Microsoft days...not good!
It is a Catalina issue for sure. I managed to isolate it to the use case of this crash occurring when the MBP16 is connected to my external QGeeM USB-C hub, through which I charge my MBP16 and connect to my desktop monitor via HDMI (I disconnected all other USB peripherals from the hub to eliminate any other possible root causes). The MBP16 works flawlessly when it is not connected to external power or the USB-C hub and it goes to sleep and wakes up without a hitch. It will consistently crash and reboot in the AM if it is connected to the USB-C hub overnight.
Apple - we need a new Catalina patch ASAP and your silence is confidence-quenching...please address ASAP! We are losing faith here...