Like KeePass databases, i'd like to see a history of ANY change made to an entry/credential. Everything should be historicized.
This is similar to the "Option to view old passwords" proposal you can find in this forum, but (imho) better: what i'm asking is, an history of any change made to the entry (eg. email change), not just changes of the password field.

Password history is already available, if this is what this request is about: https://twitter.com/Proton_Pass/status/1676986928892084224

This is important because both Proton Pass and password change froms aren't 100% reliable.This functionality provides a failsafe for password recovery, either when the user, by mistake, confirms Proton Pass prompt to update the password, but the form returned an error or when Proton Pass updates the wrong credential for the domain as Proton Pass still does not allow the selection of the credential when there are multiple credentials available for a domain.

For sure, this feature is very important, again on the security side. You need to know your old passwords for one account created in Proton Pass in case of a mistake.

Also a history of all created passwords

This occurs in the password managers that I have used (LastPass, 1Password, Proton Pass). Each website seems to be different in password requirements and sometimes the site disallows a password, while the password manager has already stored the new password. Not sure if its possible or technically the right thing to do but only save after the password has been accepted.

I create a temporary password for a website and regularly this password is not stored in ProtonPass when I register on a website. I would like to be able to manually create an entry in ProtonPass. But I can't find the password I created and saved in the website.

Use Case:
I would like to change the password for an account. I generate a new password that is immediately stored in Proton Pass. If the password change failes I can not access the account with the old password again since this is overwritten by the new password.
Reverting back to the old password would be really beneficial, since it will save a lot of time.

KeePass' functionality to view the complete history (all previous versions) of an entry has saved my bacon more than once! I cannot rely on a password manager that doesn't maintain previous versions.