It appears they specified which user data they are collecting.

quote

Information You Provide may include sensitive personal information, as defined under applicable state privacy laws, such as information from users under the relevant age threshold, information you disclose in survey responses or in your user content about your racial or ethnic origin, national origin, religious beliefs, mental or physical health diagnosis, sexual life or sexual orientation, status as transgender or nonbinary, citizenship or immigration status, or financial information. For example, we may process your financial information in order to provide you the goods or services you request from us or your driver’s license number in order to verify your identity. We may also collect precise location data, depending on your settings and as explained below. We process such sensitive personal information in accordance with applicable law, such as for permitted purposes under the California Consumer Privacy Act.

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This is currently not part of the privacy policy of the ByteDance owned TikTok.

https://www.wired.com/story/tiktok-new-privacy-policy/