Retrieve passwords saved for multiple gmail accounts in chrome browser

I have 3-4 gmail accounts along with my primary gmail account. Whenever I logged in to any of these through Chrome, the login was directly done without asking for password. But once I did some settings in my primary gmail account in chrome ‘settings’, and I was logged out of all other gmail accounts.
I do not remember passwords for the other gmail accounts as I used them occasionally and they do not have recovery emails set too.
But since I was being logged in to the accounts without authentication for a long time, I feel the passwords should be saved somewhere. I can’t find them in Chrome passwords.
Could anyone kindly guide about how to retrieve these passwords, as I have important research experiments saved in google drive associated with them.