An apparently Palestinian Arab YouTube channel called "Palestinian Refugees" made a professional video about this problem, and demands full citizenship rights for Palestinians in Arab countries.
As the channel description says:
Since the Naqba, Palestinian Refugees mainly settled in Iraq, Jordan, Syria and Lebanon.
Over the decades we have been denied citizenship of our host countries, we have been denied the ability to own property and work in numerous professions. This channel is dedicated to our silent human rights crisis - perpetrated by our own brothers.
This type of criticism of Arab states for their systematic discrimination against their Palestinian Arab brethren is practically unheard of as Arab and PalArab leaders use these people as pawns against Israel and ignore their own human rights.
Unfortunately - probably out of fear - the person or people behind this initiative are anonymous, although apparently Jordanian.
I can only recall one Arab researcher who has ever looked at this problem as honestly as this film does.