'Chrome Install button not showing up even Lighthouse says it is installable

I'm working on a intranet project and currently I'm trying to make it a PWA. Project is using laravel and I've used laravel-pwa for making it PWA. I've met all requirements and was able to successfully install it in my dev environment. But in live server, even when Chrome Lighthouse says it is PWA Optimized and Installable and there are no issues in manifest.json, install button is not showing up.