Replacing Comax video intercom

Have a Commax video intercom currently installed. The woring of the puah button/camera unit on the outside is attached here… Any way to use my Eufy doorbell?.. fhe commax seems to run on DC power…
Though Eufy demands AC 18vx wondering if the bell will work on DC.

I would not bet on it. I have seen numerous topics here of people wiring their doorbell on DC and get very flaky performance. As you are able to get to the transformer, I’d suggest replacing it with a ‘compatible’ AC variant.