Show polybar in multiple monitors

.config/polybar/config

@@ -52,6 +52,7 @@
   black = #181a1c
 
 [bar/main]
+  monitor = ${env:MONITOR:}
   width = 100%
   offset-x = 0
   offset-y = 0

.config/polybar/launch.sh

@@ -1,4 +1,6 @@
 #!/bin/bash
 
 pkill polybar
-polybar -r main &
+for m in $(polybar --list-monitors | cut -d":" -f1); do
+    MONITOR=$m polybar --reload main &
+done