How can I stop my iMac Pro from restarting on its own?

I have a iMac Pro (2017) running 12.7.4 (21H1123)

My mac has been randomly restarting itself the past couple of days, seemingly in periods of time when idling, not been in direct use. But while apps are still on it the background, some still running tasks. I managed to catch a couple of the send to apple error messages, if it helps, I have attached them here. Hasn't happened for just over a day, until right now again. Followed another post on here, booted in safe mode, then reset the SMC and then the NVRAM. Maybe that't what gave me the day without recurrence.

Anyone know what is happening?

[Re-Titled by Moderator]