try using set_fact instead of defining a var

linux/compliance.yaml

@@ -5,14 +5,12 @@
   gather_facts: yes
   tasks:
     - name: "Set become method to doas (Alpine)"
-      stat:
-        path: /usr/bin/doas
-      vars:
+      set_fact:
         ansible_become_method: doas
       when: "ansible_distribution == 'Alpine'"
     
     - name: "Set become to true"
-      vars:
+      set_fact:
         ansible_become: true
       
     - name: "Include OS specific tasks"