It is possible to connect the XLR/TRS output to an unbalanced input using a conversion cable. Sound also comes out normally. However, as a result, the performance and characteristics of balanced output will be lost. In some cases, it is worse than unbalanced output. But you won't be able to tell the difference just by listening.
Just because the sound is coming out normally does not mean that the device is working properly. If there is any influence from the surroundings, the problem will be exposed. If you have an unbalanced output, it's better to just use it.
However, if you think there is no problem with the sound quality with that connection, you can continue to use it. It will not damage electronic components. That doesn't mean you should never use it.
Use the conversion cable only when the output device has only balanced outputs and the input device only has unbalanced inputs.
To fully understand this problem, we need a theory of signal transmission in electronic circuits.
