Not sure I see the fix you are talking about.
It looks like this issue is still unresolved. Is there an ETA on this or a work around?
Same problem here. This is crucial, please fix this or let us know how to handle this!
There is a lot of confusion for people on the new EE4 because it uses docker containers. Short and sweet, without getting into the details of how docker works, because I am still a n00b at it as well, your www-data user doesn’t have access because the container itself has its own www-data user with the correct rights to do everything it needs to do. If you need to setup SFTP access for a user into the website’s data folder just follow these instructions. Configure SFTP on EE4 server. You can create a user (not www-data) with SFTP access that will have full rights to do add, edit, delete, etc.
Hopefully, most of the people experiencing issues with this will see this post.