I have absolutely no doubt on the relays themselves as they are multiple agency certified.
The most you can say without researching the actual UL files is that they have the logo stamped on the housing. Whether UL has actually evaluated them is a second question. There should be a UL file number on the relay or at least in the documentation.
The CE mark is a self-certification and only a consideration when things turn south. Everybody marks their stuff with CE.
More important to the OP: Are the relays HP rated? Simple contact ampacity is not sufficient when there are motor loads involved since the inrush current will be at least 6 times full load and the high current lasts, at some level, until the motor gets up to speed.
Next up: Is there sufficient creep distance between traces for the voltages involved (and the environment)? Note the post above about PCB failure.
If I were connecting to mains, I would buy something of quality for controlling the load and use the little interface board at much lower voltages to drive the control relays.