Blog list not sowing on small smartphone screen

I am building a site and a pretty novice user and doing my best to use the support fourums. However, I am stuck on this.
I have an ‘articles’ page where I want a full list of my blogs displayed. This is the site – https://mccm.iwsi.ie/wordpress/ and the titles are shown on the right-hand column.
However, this doesn’t show on small smartphone screens such as iPhone.