Can I use Shopify's backend to validate phone numbers in newsletter signup theme section?

Short description of issue

Is there a Shopify-native SMS authentication solution for themes?

Reproduction steps

I want to create an Email/SMS Signup theme section. Can I use Shopify’s backend to validate phone numbers or do I need to do it programmatically?

Additional info

If validate programmatically, I’m not sure how advanced I can make the phone validation to be.

What type of topic is this

Feature request