Option one: copy the item
If you want the same item to appear in multiple places within content tree, you could copy the item. Copying an item will create a new item with the same content. You would be able to edit the same content in multiple places but the items are not linked together.
Option two: clone the item
Another option is to clone an item (as many times as you wish) to any location within the content tree. This is called: content sharing between (sxa) sites using delegated area's.
If you edit a field in the original item and save it, SXA updates the field in all the cloned items in the delegated area. If you enable the use of the SXA delegated area when you clone items from a master site to a local site, you cannot change these items locally. This is because a clone is an item that is not just a copy of the original item, but one that inherits the field values from the original item. This can be convenient, for example, if you want to reuse blog posts from your master site and do not want to have to add every new blog post manually.
Content editors won't be able to edit a clone but will see a warning containing a link to the source item.
See the full documentation: https://doc.sitecore.com/users/sxa/19/sitecore-experience-accelerator/en/share-content-as-a-delegated-area.html