print composer - Printing only selected features in report QGIS 3?

My layer has more than 2900 elements, and I would like to release a map with 1 or 10 or 50 selected elements but never 2900 in the time.

I can't select them other than visually (no column to identify). Do you have an idea to output a report with only the selected elements?

I have tried the different solutions already seen on this site but nothing that allows me to release a report without saving many unnecessary layers.