To make the hide the arrows forward back on the single choice file choices in two columns all you need to do is copy paste the below to custom CSS field
@media screen and (max-width: 1733px) {

.formz-radio-group-container-grid { grid-template-columns: repeat(2,1fr) !important; }

}

OR

Add this instead to hide it completely:

div[class^='style_form-button-wrapper__modern'], div[class*=' style_form-button-wrapper__modern']{

display: none;

}

Please note that this will work on the whole form.