Keyboard shortcut to add up rem into a numbered list?

I wanted to add up the highlighted rem into the numbered list created above the said rem.

I can easily do this by dragging the bullet into the numbered with the mouse. But is there a keyboard shortcut for doing this with the whole selection of rem? Or is there a workflow I can do to do away with the mouse? EDIT: What I was previously doing was manually adding each rem by using the backspace, I can do away with the mouse, but it is tedious. I hope there is a keyboard shortcut to add the whole selection into a numbered list.

Note: The notes were a result of using an OCR software so I just copy-pasted the result into RemNote, hence, the need for me to add up the rem into a numbered list.

Thank you.