Joint letters by foreign diplomats to Pakistan

• Foreign envoys urge Pakistan to condemn Russian invasion of Ukraine during the emergency UNGA session
  

Some foreign diplomats put out a joint letter to the Pakistani government so that Pakistan condemns the Russian invasion.

I have two questions in this regard:

1. How do diplomats decide which government to urge collectively?
2. Did this happen in any other country except Pakistan (coz, I believe, no similar letter was published in the case of 35 other countries who abstained from voting against Russia)? If NOT, why Pakistan?

Note: A similar incident took place in Turkey a while ago.