Desktop amp/switcher/splitter

I’m looking for a desktop switch/hub/amp/splitter (whatever you want to call it), which ideally outputs to 7.1 surround 3.5mm jacks (the green, orange and black ones – not sure what the official name for this is).

My base use case is that I want to have a second line to my computer speakers so I can plug my laptop in when I’m using that, so as a minimum I need a 2-in, 1-out arrangement. But I’ll happily buy something more ‘heavy duty’ if needed, though I’d prefer it to be not much larger than a desktop headphone amp/DAC or similar.

At the moment, the best I can find is this (https://www.amazon.co.uk/Nobsound-Switcher-Passive-Selector-Splitter-Black-RCA-Version/dp/B07CQXRRRV?ref_=ast_sto_dp). This has the 2-in, 1-out arrangement, and I have an RCA to tri-3.5mm adapter for the speakers to handle the output. This isn’t ideal though as it will lose the surround sound for the computer which is currently plugged directly in to the speakers.

I know there will be no surround sound from the laptop (which is fine), so really all I need to do is hook in to the green line with the laptop, but if I could get this in the form of a switch/hub to swap on the fly that would be great.

Other ideas I’ve not considered are welcome!