How can I get custom image links to open in a new tab?

I am working on a directory containing addresses, and I want to add social media links for each address in the directory.

I would like to do this by including clickable icons with links to the URL of, eg, the relevant Facebook or Twitter page for that address. I would like this to open on a new tab.

I have managed to do all of this by uploading social media icon images to the WP Media file and inserting custom links on the drop-down menu. The only thing I cannot do is get the links to open in a new tab.

See example at this link:
https://credituniondirectory.co.uk/credit-unions-in-derbyshire/

Is there any way to do this? I’ve searched plugins but can’t find any that will allow me to do this – maybe I’m using the wrong search terms. Does anyone know of a way to do this, or of a relevant plugin that would help me?

There are lots of plugins to insert social media “follow me” icons, but I couldn’t find any that would help me link to many different social media pages.

Thanks.