I have observed elections in the following countries.
Russia – since 2011,
Poland – 2018,
Sweden – 2019,
Montenegro – 2020,
Moldova – 2020,
Kazakhstan – 2022,
Slovakia – 2022,
Estonia – 2023,
Armenia – 2018, 2021, 2023,
Turkey – 2023,
Bulgaria – 2024 and
Azerbaijan – 2024.
There were three types of observations: classical EOM with visiting PSs (STO or a part of CT), using data analysis only and using video only. Sometimes it is a mix of them, sometimes it's a disaster, like happened to be in Kazakhstan.