How Can You Increase Your ALFA AWUS036NHA Txpower in 2020?

Hi I'm kind of new at using Kali linux for pen test but I've been coming around some annoying issue as I cannot find any way to increase my txpower to 30

there's plenty of tutorials out there but none of them work for some reason and the most recent one from 2019 askubuntu.com/questions/1165300/how-to-increase-txpower-of-my-wifi-device

doesnt seem to work anymore as I cannot get the required packages ( apparently they're not supported in python3 or somthg) anyone has a lead? I'd gladly appreciate