Remove specific URL from sitemap

Hello,

I would like to know, if you can share a snippet to remove a specific URL from the functions.

Notes:
I can’t make them from the Rank math settings.
I don’t know the ID of the URLs, nor can I edit them.
They appear inside the portfolio sitemap

Urls portfolio:

https://www.midominio.com/projects/
https://www.midominio.com//blog/projects/