Touchbar during active screensaver

While the screensaver is active, the touchbar reverts to the standard macOS one.
I'd really like the ability to have some useful information displayed (even if it's not actionable since the computer is locked) both for the practical aspect as well as being able to make it visually seamless with the displayed information I have during normal operation.

Unfortunately I don't think the available API allows me to do this ;-(