They are coming.
We know that the first units were already sent, so these three aren't among those on we've been tracking on ships to Europe.
Tesla Model 3
The tweet encourages one to visit the online design studio, which means that Tesla - after not much of a marketing effort in the first year, when the car was available only in North America - seems to be attempting to gather more orders in Europe.
Voluntary dataset (unofficial) gives us a glimpse at the number of orders. As of January 22, 2019 the counter shows 15,786.
The European charging inlet in the Model 3 is compatible with CCS Combo 2 for 1- and 3-phase charging, as well as DC fast charging from both CCS chargers and Superchargers.
European Tesla Model 3 - CCS Combo-compatible charging inlet
Source: Tesla Model 3: Europe Orders