Some issues creating a template

@Cucciolo's-Josh

You can configure a text validation and use a Regex pattern to apply the format you want. You can also apply a character limit to restrict the user input.

Expiration date: 
Regex: ^\d{2}\/\d{4}$
Character Limit: 7

I have also seen customers that implemented an expiration date with two drop downs, one for the month and one for the year to ensure users are only able to select the right values, like a month from 01 to 12 and a year that starts with the current year and up to ten years in the future.
 

Phone number
In regard to the phone number, there are many different formats available. You can check this library for regular expression to choose your desired format, for example the following:
^\D?(\d{3})\D?\D?(\d{3})\D?(\d{4})$

Be sure to provide an error message that clearly defines the user input format to they can correct it when they are providing a format that is not desired, which will block submission.