After configuring the xdebug on wsl2 according to the official guide in PhpStorm website have to write the following script to generate xdebug.ini with correct HOST_IP. I execute this script every time I reboot pc.

generate-correct-xdebug.ini-on-wsl2.sh

#!/bin/bash
lin_ip4=$(ip -4 address show label eth0 | grep inet | sed 's/^.*inet //' | sed 's/\/.*$//')
touch /tmp/foo
f=/tmp/foo
/mnt/c/Windows/System32/ipconfig.exe | sed 's/.$//' > $f
a=$(cat $f | grep -n WSL | sed 's/:.*$//')
b=$(cat $f | wc -l)
c=$(( $b - $a ))
win_ip4=$(cat $f | tail -n $c | grep IPv4 | head -n 1 | sed 's/^.* : //')
echo $win_ip4 #above code is from here: https://www.reddit.com/r/bashonubuntuonwindows/comments/i4m90o/how_to_know_ip_address_of_windows_within_ubuntu/

echo zend_extension=\"/usr/lib/php/20190902/xdebug.so\" | sudo tee /etc/php/7.4/mods-available/xdebug.ini >/dev/null #xdebug path can differ
echo xdebug.remote_enable=1 | sudo tee -a /etc/php/7.4/mods-available/xdebug.ini >/dev/null
echo xdebug.remote_port=9012 | sudo tee -a /etc/php/7.4/mods-available/xdebug.ini >/dev/null
echo xdebug.remote_log=/tmp/xdebug.log | sudo tee -a /etc/php/7.4/mods-available/xdebug.ini >/dev/null
echo xdebug.remote_host=$win_ip4 | sudo tee -a /etc/php/7.4/mods-available/xdebug.ini >/dev/null