How do I turn off the Fax Number from the one checkout page? (version 2.4)

On the one checkout page, it asks for a non-required fax number.  I disabled this under settings and customer, but it still shows up. Why is this happening?  I cleared the cache and restarted the application and nothing is happening.

This option disables a fax address field during customer registration and on customer info page. Now you cannot disable this field during checkout without source code customization

Thanks for the reply.  I also found that it requires the email address for the shipping information, which isn't needed.  I was hoping to make a simple change in the cshtml using razor to set them to disabled, but I guess I'll have to dig into the controller's code.

I forgot to mention that I can't change it from the cshtml because you can't determine if it's a shipping or billing address from the model.