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.