https://citizens-initiative.europa.eu/_en, This is the initiative I am talking about. You have to prove you are an EU citizen and then you can sign for the initiatives you want and if a million signatures are reaching within a year then it must be brought to the EU commission.
So if citizens of EU member states can sign online, why can’t they vote online for elections or referendums? If possible, this would decrease the need and power of representative democracy and move closer to direct democracy, which I argue is a good thing
As for voting under duress, it’s also a concern with mail in ballots and voting by phone. It can be worse with online in the same way that scams are easier online.
I know someone who voted by phone this recent election in my home province, and they were eligible to do so because of sudden health issues. The phone call included multiple people who verified their information, took down the vote, and then verified the vote. I imagine something would get flagged if there was any discrepancy.