On the off chance I did buy this docking station and I can confirm that both display port connections have the DP++ logo. I am now successfully running two HDMI monitors with one HDMI and one passive DP-to-HDMI cable.
There are hardly any decent pictures of the side with the connectors on the net, which makes this pointless guesswork necessary.

Unfortunately not. The manufacturer does not provide any information in this regard, at least not after my clarification. Further technical details can be found here:
https://support.lenovo.com/ch...