Congratz to the Man City fans
Man City has a really amazing achievement this season and I don't think many teams can do what Man City has done this season. They succeeded in getting a treble winner because they deserved it. They have had good preparation from the start of the season and all the players also have very good dedication. One of the important factors that can make Man City what it is today is the expertise that Pep Guardiola has.
The answer to whether many teams can do or have done what Manchester City has now done can easily
be found on Wikipedia.
The last time a club from the Premier League has won the treble is 25 years ago and was won by Manchester United. There is no other English club who has done that before and there are only two clubs who won the treble twice and those are Barcelona and Bayern Munich. That is why the achievement is so impressive because it is very rare and difficult to pull it off.