Сергей Шпилькин made an interesting comparison of statistics from the 2020 Constitution Referendum and the 2018 Presidential Election. 

Dependencies of "YES" response rates on total, early, and non early turnout in the 2020 nationwide vote: The "YES" response rate has a VERY high correlation with early voting and is almost independent of the July 1 vote.

See the following.

Not really, the slight bend of the Moscow tail downwards shows that Moscow was rather topping up than overshooting - and you can only hit the point (100%, 100%) by overshooting.

UPD: Mistake in the legend. Where it says "norm votes", it should read simply "votes" - including anomalous

Official name:

Russian national vote to approve amendments to the Constitution of the Russian Federation

Challenger/Leader:

Option "YES"

Wikipedia article:

All-Russian voting on amendments to the Russian Constitution

Official name:

Milli Məclisə seçkilər

Winner/leader:

New Azerbaijan

Wikipedia entry:

Election of the Parliament of Azerbaijan (2020)

In our version, the most criminal gubernatorial elections of EDG-2019 were in Bashkortostan, as well as in Volgograd and Kursk regions.

The most criminal EDG elections 2019 according to Maxim Y.: Bashkortostan, Volgograd region, Transbaikalia / Kalmykia