Just to be more clear (sorry for my previous short comment), I ran into this issue when trying to improve the looks of my application's links, when shared via social networks (Facebook, Whatsapp, etc).
I was specifically trying to add an image preview, but then noticed the other meta tags aren't working either (according to: https://developers.facebook.com/tools/debug/), despite when inspecting the page (via chrome dev tools), I am able to see them.
I am currently not using any plugins or components, I am simply appending the meta tags using a set of client actions that run inside the 'OnReady' event of the page's screen (Reactive Web Application).
"Reactive apps work as Single Page Applications, where most of the content is created by JavaScript in the browser. Some crawlers, like google search engine, work correctly with this (they use browser-like JavaScript engines to run the code on the page on their side). Others, like Facebook (which ironically created React) do not yet support that."
Are you telling me that SEO Friendly URLs are not yet available in reactive apps in Outsystems? I have run into several react-based solutions that use the 'react-helmet' package, don't know if you have considered this. Are there any known workarounds other than the one you mentioned (https://www.prerender.cloud/)? I am not interested in using external services. Thank you in advance.