Raspberry Pi constantly drop wifi and won't be able to reconnect itself. Run this script on a cron job on a regular basis to keep headless pi connected.

check_wifi.sh

#!/bin/bash
#=================================================================
# Script Variables Settings
wlan='wlx801f02b56d73'
gateway='192.168.0.1'
alias ifup='/sbin/ifup'
alias ifdown='/sbin/ifdown'
alias ifconfig='/sbin/ifconfig'
#=================================================================
date
echo " - Auto Reconnect Wi-Fi Status for $wlan Script Started ";

# Only send two pings, sending output to /dev/null as we don't want to fill logs on our sd card.
# If you want to force ping from your wlan0 you can connect next line and uncomment second line
ping -c2 ${gateway} > /dev/null # ping to gateway from Wi-Fi or from Ethernet
# ping -I ${wlan} -c2 ${gateway} > /dev/null # only ping through Wi-Fi

# If the return code from ping ($?) is not 0 (meaning there was an error)
if [ $? != 0 ]
then
    # Restart the wireless interface
    ifdown --force wlan0
    ifup wlan0
	sleep 5
	ifup wlan0
fi
ping -I ${wlan} -c2 ${gateway} > /dev/null
date
echo " - Auto Reconnect Wi-Fi Status for $wlan Script Ended ";