European orders have been discussed in this thread. If you scroll down there are also Europe resellers mentioned.
Yes you can directly order on the OSMC Shop when you place your order you will be asked which power plug you require and then get the correct power supply in your order.
Updates are automatically provided to the Vero. You just need to confirm “Yes” to install them.
Dolby Vision Profile 5 will be automatically converted into HDR10 and sent as such to your TV. Other profile will just use the HDR fallback layer.
This post gives more details: