I suppose, one could argue that Arab countries could have applied efficient diplomatic pressure for a two-state solution if they cared enough to resolve this - decades ago. But I have the impression this would be only part of the story.

Another part is related to the West. The bottom line is that the Zionists are given weapons to commit a genocide in Gaza Palestine, and sustain an occupation for over 7 decades. This is related to the fact that Palestine is not recognised as a country by the US, Germany etc. As long as the traditional colonisers don’t sign these papers they will keep sending military equipement without repercussions internally or internationally.

Not too sure what you mean.

According to wiki 146 of the 193 United Nations (UN) member states have recognized the State of Palestine, including the ones you mention:

• Egypt recognised Palestine 18 November 1988
• Morocco on 15 November 1988
• Algeria on 15 November 1988
• Saudi Arabia 16 November 1988