[Plugin: WP-dTree] Collapsible Posts Index

I love how this works for categories. Is there a way to add a widget that will show an alphabetical list of posts? You can see what I have in my left sidebar now:

https://www.freefireapps.net

I’d love to be able to collapse that via the letter each posts falls under.

https://www.ads-software.com/extend/plugins/wp-dtree-30/