Explore <install> as a declarative browser-rendered installation button, with one option for the current app and another for an external app such as MDN. This declarative option is useful because the browser renders a trusted install button, avoids the beforeinstallprompt ceremony, and keeps the user intent signal clear.
<span>BaselineLab: </span>
<install>
Your browser doesn't support the install element.
</install> <span>External App: </span>
<install installurl="https://developer.mozilla.org/">
Your browser doesn't support the install element.
</install>