My home country (Israel) has enacted a set of quarantine rules for residents returning from abroad depending on which countries they visited in the 14 days prior to return.
Question:
If I were to fly from Israel to one Schengen country, and then from there to some other Schengen country and back to the first one before returning to Israel, is there any possible way for Israeli authorities to know I've been to the second country? Supposedly there is no passport control between Schengen countries, but it seems this has at least partly changed due to Covid.
Edit:
You may safely assume that the law in question is stupid and that there is no relevant difference covidwise between country 1 and country 2.
The motivation here is not avoiding quarantine in general, which I'd willingly do, but specifically to avoid quarantine in a government facility rather than at home, since the former is the current law for all who visit country 2.