My current set up in the landing/hallway for a two way is a bit of a cheeky one, double gang aqara downstairs and a wireless button over the top upstairs. I did this because the back box is less than 20mm which is silly and no room to make it deeper. I will probably end up doing the same as the hallway lights are completely automated with aeotec tri sensors. I am not sure (only because i cannot find any documentation or guidance on them) that they support two way switching, if i come across it i will definitely post an update.
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