Yep (and I had the same reaction).

From their privacy policy.

Data you provide to us. When you use Plaid’s products or services, like when you connect your financial accounts (like your bank accounts) to a developer’s app through Plaid, we may collect the following data from you:

• identifiers like name, email address, and phone number;

• login data when required by the provider of your account, like your username and password, account and routing number, or a security token.

• when needed, data to help verify your identity and/or connect your accounts, including your Social Security number, date of birth, security questions and answers, documentary ID and one-time password (OTP).

https://plaid.com/legal/#consumers

Additional reading: https://security.stackexchange.com/questions/198005/is-plaid-a-service-which-collects-user-s-banking-login-information-safe-to-use

EDIT: And a lawsuit: https://www.ctvnews.ca/mobile/business/td-bank-files-lawsuit-against-plaid-accusing-it-of-trying-to-dupe-consumers-1.5145326