Webflow does not have any native support for this.
It does support a custom sitemap, which you can create and paste manually into site settings, but you have to update that manually with every change.
When my SEO-intensive clients need automatic sitemap changes, I fix them through a custom reverse proxy setup.
The sitemap mods in general are simple enough however aggregating data automatically like image count and last modified date are more tricky since they require analysis modules, update triggers, and a storage system.
You’d have to decide how much you want to invest in that level of automation. Here are a few details on the types of systems we build for this;