The item listed is not a power adapter. It is a USB C hub (port replicator).
Your 29 W charging adapter is sufficient according to the technical requirements.
According to the data sheet: The system is bundled with a 29W USB-C power adapter.
I would buy a 61W adapter, it doesn't have to be Apple, there are cheap providers that have a USB charging socket, for example, if you still want to charge your mobile phone. See here for the point of contention:
https://www.ifun.de/usb-c-am-m... And then read the comments.