I checked your website and didn’t find any problem with the theme.
Which exact iPhone / iOS you are using?
P.S. I tested website on iPhone and didn’t find the problem you describe.
Also, I noticed that you have too many plugins activated, so I suggest you to temporary deactivate All plugins and check again, if after that the hyperlinks work on your device, activate the plugins one by one until the problem occurs again so you will know what plugin(s) causes the problem.
Having too many activated plugins is good recipe for disaster.