I don’t have the feature to use Face ID with mask

Your iPhone 6S does not offer this feature. It is only available on iPhone 12 and later models.

If you have a 6s, as your profile implies, you can't use faceid without a mask either, since that device does not support Face ID at all...

iPhone 13 Pro Max…. iOS 15.4.1…. NO OPTION for face ID with a mask ***grrrr***