You have not included your current build_version_string but from this thread e/OS community vs official version (android 15 vs android 14) I assume you are still on community - a15
Oddly from /e/OS community shiba download
we see that e-3.1.1-a14 was released but latest a15 is still e-3.0.4-a15-20250712508365-community-shiba