I don't have any personal experience with this mixer but I would think it should meet your requirements.
https://www.amazon.com/Depusheng-Ultra-Compact-Channels-Headphone-Amplifier/dp/B07JQ93CQZ
That's just free-market capitalism. Companies try to disrupt each others sales all the time. Look at Lyft and Uber- constantly trying to take out the competition.
Also, Behringer's Swing has it's own firmware and added functionality, so it's not a 1:1 clone.
How about all of these 4 channel mixers? Are they all trying to disrupt Behringer's sales?
Why don't people get upset about this?