Branch write permissions from access key?

[danthegoodmanicloud]

It seems this is possible in BB server since a while ago (https://www.atlassian.com/blog/bitbucket/add-access-keys-branch-permissions-bitbucket-server-4-14), is this something we can do in BB cloud?

I need to push back to a repo to update semver versions, and I only want the pipelines itself to be able to do so on protected branches. When I start typing the access key in the write permissions input, there is no autosuggestion showing I can use it.

[danthegoodmanicloud]

I've also found this: https://stackoverflow.com/questions/56828685/cant-git-push-to-bitbucket-unauthorized-fatal-could-not-read-from-remote-re/56828686

Is the write using access keys a feature only found in BB server? That seems like it would be very strange...