RE: Dynamic CRM 9.1 on premise - Is there any way to show document templates in sitemap apart from advance setting?
You can try to add as a URL into sitemap in your UCI app.
url format is http(s)://<<url>>/Orgname/tools/templates/templates.aspx?pid=05
alternately, you can try to add web resource and inside the webresource set source to the above url.
You can add additional html buttons to create new templates
Your html will look something like this
<html><head><meta></head><body style="overflow-wrap: break-word;" onfocusout="parent.setEmailRange();"><script>
location.href = '/DEMO1/tools/templates/templates.aspx?pid=05';
</script>
</body></html>