From wednesday we can use our bikes again.

[Gnasher]

Having never owned a new motorbike I'm not quite sure what the first service would actually be?

In reality not a lot, with yours, plug it in, check for codes, change oil/filter, visual check of the whole bike, wheeels/tryes/bolts/bulbs etc (many don't even do that)  input service data, reset service interval.  That's it, there supposed to road test, most don't, its all about time and workshop through put i.e. money.

If you you want to keep using it, change the oil/filter with OE spec and keep the receipts as proof, ride it.  Any dealership will have a very hard job of trying to refuse warranty due to the current situation, if fact to get manufactures warranty you only have to prove it's been serviced correctly, not that they did it.