m4 Mac mini wakes up from sleep unexpectedly

M4 Mac mini wakes up from Sleep mode within 22 min to 2hr 26 min.

This issue started with latest version of Sequoia 18.??? prior to Tahoe 26.

I am the only user of this Mac (not Shared with anyone) and am not in the room when Mac awakes.

Mac wakes up:

1. Whether 3rd party accessories (mouse, external drive, usb dongle) are connected or disconnected.
2. Whether Bluetooth accessories (Logitech mouse, Apple magic keyboard) are powered or powered off.
3. Whether power cords for Mac mini or Studio Display are connected to UPS (APC) or wall outlet.
4. Whether Mac mini is booted in Standard Mode or Safe Mode.
5. Whether user or Test user is logged into Mac OS Tahoe 26.0.1

Apple telephone support has examined Settings on multiple phone calls without success.

This issue first reported to Apple with latest version of Sequoia 18.??? prior to Tahoe.

Mac mini is connected to ATT Gateway (router modem) with Cat 6 Ethernet cable (NetGear GS105E 4-port switch between Gateway and Mac mini).

ATT Gateway is connected to ISP via 1Gb Fiber.