Well, if it is really easy for you to do - then why not do it?
I ended up doing a share page myself - and expanded it a bit in order to tell the user more precisely what to do - including the installation process.
I dont see such any place. I can see that you can make button copy to clipboard - but that about it.
It would be really nice with a share button as the one that is found on the native share page.
One of the actions for buttons is to ‘Show Share Sheet’ which gives you several ways to share your app link. On my phone I can copy to clipboard as well as share to several social media apps, text, and email apps. Creating the page yourself gives you a lot of flexibility as far as control over the layout