First, I would like to thank the Keenetic group for getting to know me It turns out you can create a separate chat in Telegram: KN-Dating.
For my part, I want to say the following, having looked and read the information about Zyxel Keenetic Plus DSL - I have not found any mentions about region binding. Even more, I thought that the whole situation with the regional firmware changes is just in the functionality, but not the full functionality of the device.
I wish it had been specified (that such locking is possible). Also, I would like to be able to re-bind - such devices. For example - I came from Russia with my Keneetic Peak, and that I would have to buy a compatible device in Russia (or buy Keenetic Peak DSL, which is expensive).