A newly installed macro does not show up in the page editor so it cannot be added to a page.
There is a known bug in Atlassian that sometimes makes newly installed macros not show up for insertion into a page.
Refresh your browser cache to work around the bug: How to hard reset browser caches for a given page
See CONFCLOUD-58280 (Newly installed apps with dynamic macros can't be found in the list to insert into a page)
If trouble shooting steps don't work
Please vote and comment on our ticket HTML-104