Vote in person then 🤷
Here it’s only possible to mail vote from abroad and I have never done it but it doesn’t appear that you get a confirmation here either.
If we are talking about registers of who voted and not for whom. Why does it matter? Who voted isn’t secret at all. So why even bring that up? For the record I voted in the most recent EU and national elections.
Can’t you vote at an embassy or consulate?