Session replay is an add-on feature for paying customers only. You may try the feature for free for 14 days or 10,000 sessions (whichever comes first), after which you must contact Sales to continue use.
Session replay is for Web only. Native mobile (Android, iOS) session replay is not currently supported but is on our roadmap.
If your users are using a newer version of Chrome (versions 90+), Heap will be able to render the heatmap correctly for websites that use a Shadow DOM.
Heatmaps uses static page content to create a background image, which presents challenges with the Shadow DOM, because in most cases a Shadow DOM is generated by Javascript after the page loads.
Google Chrome 90+ introduced the support for Declarative Shadow DOM, which makes it possible to capture the content snapshot including Shadow DOM without using Javascript.
Community Quote
Check out this community post to learn more about using a Shadow DOM with Heap.