The homepage slider is not editable from Elementor.
I can not find it also in the menu.
Attached files: support.png
Thank you for your message.
The slider can be edited by going to the "Pages" admin tab and edit the homepage (not within Elementor mode), at the bottom of the page you'll find the slider option field.
Hope this helps.
Attached files: slider field.png
Best regards,BarryQreativeThemes.com | WordPress Themes