[kolla][kolla-ansible] Contributing to a Gerrit change not owned by me

Hi everyone, I have a question about contributing to an existing change in Gerrit. Is it possible to propose additional commits or modifications to a change that I do not own (i.e., a change created by another contributor), so that my update will appear as a new patch set on the same change, not as a separate one? If yes, what’s the recommended workflow or best practice to do this in the Kolla Ansible project? Also, do I just need the approval or agreement of the change owner before pushing my patch set, or are there any other formal steps required? Thanks in advance for your guidance!