I can’t speak to other European countries...just to the German situation.
These modesty patrols or Sharia Police games just haven’t worked well in Germany. A lot of young Turks just laugh in their face.
In the few isolated occasions in Germany where it’s been noted...cops usually stopped them when they were interfering with public walking and suggested they move on. These are mostly all young male punks between 18 and 25. You never find anyone in these Sharia patrols in Germany over the age of 35.
I would add this note....having lived around Germany for more than 20 years. If you were hard-core religious with any type of religion...coming to Germany and hoping to retain your religion would be an enormous risk. You can figure roughly one-third of the nation are atheist (more so in the eastern side of the country). Toss in liberal alcohol views, progressive TV, open view on marijuana, and dozens of other social values...I’d take a guess that every month...the Islamic folks lose a minimum of a thousand German believers. This Sharia Police thing would be seen as a collection of “clowns” more than anything else.