This text does not appear in the link. I do see:

>Call Logs: We collect information about calls made using Phones, including the phone numbers you call or receive calls from, the date/time of the calls, and the length of the calls. We also collect network quality metrics and other technical data related to call performance. Please note that we do not record calls.

The version of the privacy policy cited in the previous discussion cited that voice audio is collected for the purposes of forwarding it to the other phone.

In addition to collecting all the metadata they also collect the voices of children recorded in voicemails.

Their policy says that the information they collect is used to "Send you marketing communications (see the section below for information about how to opt out of these communications at any time)" and to "Monitor and analyze trends, usage, and activities in connection with our Phones and Services, including to generate de-identified, anonymized, or aggregated data" and to "Target advertisements to you on third-party platforms and websites (for more information and to opt out, see the Targeted Advertising and Analytics section below)"

Remember that "de-identified" and "anonymized" is a lie. De-identified data can be re-identified, and anonymized data can be de-anonymized. Often trivially. There are even situations where individuals can be identified from aggregated data.