Gibt ja noch andere Shops zmB. https://www.melectronics.ch/de/p/798745900000/lenovo-tab-m10-2nd-gen-folio?gclid=CjwKCAiAzrWOBhBjEiwAq85QZ6BvT7zwdbj5LnP_-vPwJxDMyHGBs7f12tyuXu5Nl-Sz0mOQPF5qgRoCslIQAvD_BwE&gclsrc=aw.ds

This should fit: SBS Micro USB Travel Charger 2100 mAh (10 W, Fast Charge)

No, there is not. I don't know of any tablet in this price range that supports real stylus pens.

Alexa app is already installed. Registration also works without problems in Switzerland.

Yes. But I can't say how reliably.

I don't think so. The dock must first be set up with the tablet anyway so that Alexa works, otherwise nothing works, not even pairing. For a pure sound dock, there are certainly simpler solutions without Alexa.