I just went through this in a very frustrating chat session. It doesn't make sense? They told me they have heard this numerous times and have escalated the issue. They advised I import into classic to watermark and then put them in CC to edit. Not happening. Who has time for that. I will definitely vote.
A lot of us in the community have been asking for this on mobile for a very long time. As this is now a whole ecosystem, it needs to be in all the CC apps. Hopefully by adding your vote, it'll help amplify the voices and this squeaky wheel will get oiled.
How is this solved? The link tells nothing. Even when searched for "logo". How can the premier photo editing software in the world, used by millions of professional photographers around the world, NOT provide the capability to insert your own logo?!? NOT acceptable!