can I use my Imac 27 mid 2011 with a m2 pro mini.

No you cannot.

Apple has deprecated Target Display mode several years ago. The last Mac that could host that was a 2019 model running Catalina.

There are third party solutions that might appeal to you. Luna and Duet.

Honestly, I would avoid all the headache and simply buy an inexpensive HD monitor for your new mini.