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Tallinn adds 70 of these parking spaces.
I've found proposed places to add them

https://www.google.com/maps/d/u/0/viewer?mid=1_Xy8rtXH4ix-6wnZV2cKUJU19DN3svlO&ll=59.430170242139724%2C24.76790337179563&z=15

Is it possible to tag it?

I've only found this:
https://wiki.openstreetmap.org/wiki/Proposed_features/ElectricScooters