Enforce Trailing Slash on Sitemap

A client has asked about enforcing trailing slash, I have used the method for the Kirby Docs: Quicktip: To slash or not to slash | Kirby CMS

However, the issue is that they still appear without a trailing slash’ in the sitemap. I am using the Meta plugin for our sitemap.

I would just remove the trailings slashes but unfortunately they migrated from Wordpress and had trailing slashes implemented.

Is there any way to solve this or is it a plugin question?