Sharepoint Mobile App - Form Not Showing

We have a company of about 30 people. We created a form on a SharePoint page for employees to submit time off requests. When opening the SharePoint via the mobile app, sometimes the form shows. Other times, it will say to log back in and when the employee does, the form will not show. We've tested it on different types of phones and that doesn't seem to be causing the issue. Any suggestions on how to get it to show up for all employees?  All employees are members of the site.