Is it possible to make a phone number field mandatory for some countries and not others in Checkout?

Are you using an app that does that?
From what I can tell, the Form Options in the checkout settings do not exist.

These options I can see.

  • Checkout customization

  • Checkout rules

  • Customer contact method

  • Customer information

  • Marketing options

  • Tipping

  • Order processing

  • Abandoned checkout emails

  • Order status page

  • Checkout language

I know that checkout rules only appear because of a Shopify functions app. Is that something similar to the forms options section?

I do have a shopify plus account, is this something that you have to specifically request from shopify?