Google is confirmed for storing passwords in plaintext since 2005: https://www.wired.com/story/google-stored-gsuite-passwords-plaintext/
Frankly, even though I'm using HW based U2F to authorize myself at all Google services, you have frightened me and I have followed the link, but the story calmed me down . It says only small part of G Suite accounts is vulnerable.( I'm not a user of it). Anyway it's shame for such top company to keep users password (even the small part of it) in a plain text format.