carlo@carlo-H110M4-C2H:~$ iwconfig; cat /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf
enp2s0    no wireless extensions.

wlx18d6c710fe76  IEEE 802.11  ESSID:"Made Wirawan"
          Mode:Managed  Frequency:2.412 GHz  Access Point: 88:5D:FB:E3:F8:0A
          Bit Rate=65 Mb/s   Tx-Power=20 dBm
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=63/70  Signal level=-47 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:2  Invalid misc:77   Missed beacon:0

lo        no wireless extensions.

[connection]
wifi.powersave = 3
carlo@carlo-H110M4-C2H:~$