Some Waybar options use variables (fonts, thermal)

group_vars/all/waybar.yml

@@ -39,7 +39,7 @@ waybar_options:
     timezone: "Europe/Paris"
     format-alt: "{:%Y-%m-%d}"
   temperature:
-    thermal-zone: 6
+    thermal-zone: "{{ cpu_thermal_zone | default(6) }}"
     critical-threshold: 80
     format: "{temperatureC}°C  "
   cpu:
@@ -123,7 +123,8 @@ waybar_style:
   fonts:
     bar:
       family: 'Fira Code Nerd Font'
-      size: '12px'
+      size: '{{ waybar_bar_font_size | default("12px") }}'
     tray:
       family: 'DejaVu sans'
-      size: '12px'
+      size: '{{ waybar_tray_font_size | default("12px") }}'
+