Here are my guesses and you can tell me how wrong I am
Referendum on free trade: Succeeds somewhat narrowly, but not necesarily because of environmentalism but rather on protectionist grounds. Expect this to suddenly overperform in post-industrial and conservative regions of Switzerland and underperform in cities
Electronic Identification Law: Fails very easily, with the left and right united against it (for the right, expect the usual conspiracies about 5G Bill Gates-Soros microchips or whatever). Breaks 70% opposition
Burqa ban: Against the instincts of the political class, this succeeds by a surprisingly large margin (high single digits or more). If there is one common trend in European politics lately is that you never bet against the anti-immigration position winning and that anti-muslim positions are arguably the most popular positions to take. This is also a reason why the far right is winning in the first place literally everywhere in Europe.