I have publicly shared my Google Calendar from the web application and shared the link with roughly 150 members of a WhatsApp group. Users who access the link on mobile devices are reporting that the link doesn't work properly opening an empty calendar.

Do I need to do anything else from my end?

Steps to Recreate Problem

1. Create a Google calendar in the web app and add a few events.
2. In calendar settings, under "Access permissions for events" enable the option "Make available to public"
3. Click on the "Get shareable link" button and share the link via WhatsApp web to the group.
4. Mobile users are reporting that the link opens an empty calendar.

Additional Resources

1. My Public Google Calender link
2. Google Support > Share your calendar with someone
   ^{(the instructions I followed)}
3. My Calendar Settings