Sorry to hear of the problem you are having.
I have tested the demo site content form https://jevelin.shufflehound.com/elements/contact-form/ on mobile chrome browser and it is working fine for me without any issue.
Could you please tell me which browser you are using?
Also please test it on another browser.
The screen shots are from my iphone. You can see you can’t see the placeholder text in the name and email fields in the contact forms nor can you enter one in.