Yes. Often an add on. In Canada, it's especially the case with koodo (telus' "discount" brand) or lum (sasktel's).

E.g., https://www.koodomobile.com/en/rate-plans

Pick 1 FREE Perk (available in Self Serve) Premium Voicemail Unlimited International SMS (from Canada) Rollover Data

Where the roll over data is the much better choice that would hurt to give up for roll over data