Hello, the Slim Pen 2 already, I don't know about the 1. It works with the Signature Edition of the keyboard.

Unfortunately not. The keyboard is optimised for the Surface Pro 8 and Pro X.

Yes, the Surface Pro Signature Keyboard with Fingerprint ID is compatible with the Surface Pro 8 and can be easily connected and used with this device to provide a complete laptop experience.

You can find the English international version of this keyboard at the following link: Microsoft Surface Pro Signature Keyboard with Fingerprint Reader

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The fingerprint sensor is included. It is a biometric alternative to facial recognition, which the devices can also do, and is therefore not absolutely necessary. I personally prefer the fingerprint sensor. There is a cut-out for the stylus, but the stylus is not included in this version.

you have to ask Galaxus directly 🥸

yes

Yes, no problem.

No, they are not.