external keyboard and mouse lights up in sleep mode

If these are Apple brand external peripherals ...try removing the Hub and plug directly into the Mac and compare your results

"when connected to thunderbolt hub with external mouse and keyboard (both wired)"

You can file a bug report  here:  hhttp://www.apple.com/feedback

I would contact Apple and see if they can escalate the issue—Call Customer Support  (800) MY–APPLE (800–692–7753)

or on line  Apple Support

SpinGee wrote:

Hello,

i have mac book pro m1, when connected to thunderbolt hub with external mouse and keyboard (both wired)

and display, in sleep mode , keyboard and mouse gets lights up randomly when mac book do something when sleep, display stays off but peripherals lights up , very enoying especially at night since i have working table in bed room.

i turned off tcpkeepalive and powernap and everything in options energy saver which helped to some degree but not entirely, main problem i think is that mac shouldnt light up peripherals when doing some work at sleep mode...

thanks for any help

You can try making change to >System Preferences>Battery> both Power Adapter & Battery setting and compare your results

an example :

Change Power Adapter preferences on a Mac notebook

Change Battery preferences on a Mac notebook - Apple Support