I was facing similar issue, but with WiFi dropping on battery power. Please check this comment -
Basically you have to create /etc/NetworkManager/conf.d/00-wifi-powersave.conf file and have this inside it
[connection]
wifi.powersave=2
I made this change this morning and have found that my WiFi does not disconnect anymore. I’m not sure if you’re allowed to edit files in /etc directory on Kinoite. But this should most probably fix your problem as well.
Since you’re using iwlwifi driver for your Intel WiFi chipset, check logs once if there is any error message.
$ dmesg | grep iwlwifi
Check sections 6.6.6, 6.6.7, and 7.4.2 in this article - https://wiki.archlinux.org/title/Network_configuration/Wireless, and section 3.7.1 here https://wiki.archlinux.org/title/Power_management#Network_interfaces
I think most probably creating/editing /etc/modprobe.d/iwlwifi.conf should work
options iwlwifi power_save=0 # disables power management
These may solve your problem at the network driver level if the previous method didn’t work.
In my case, I made configuration changes in both places because the Realtek drivers really suck.