The Swans left Newcastle with a point after a 1-1 draw, but the Premier League's bottom club were aggrieved not to have departed with all three having seen Diame block Van der Hoorn's goal-bound effort with his arm before the break.
VAR has been trialled in the last seven days in both The FA Cup and semi-finals of The Carabao Cup, and Carvalhal insisted that if it was used in this clash his side would have had a man advantage and a spot-kick.
"I must be honest, I didn't see it [the penalty claim] at the time", he told a news conference.
Asked if his team's shortcomings might persuade owner Mike Ashley to loosen the purse strings, manager Rafael Benitez said: "I think he already knows".
"It was like against Tottenham, their first goal is offside and would not be valid", Carvajal added.
They remain rooted to the foot of the table and four points adrift of safety, but Sweden global Olsson has seen enough in the four games they have played under new manager Carlos Carvalhal to believe they can rescue themselves.
Aung San Suu Kyi hails military probe into Rohingya mass grave
India has also pledged to give Myanmar $25 million for development projects, including prefabricated houses in Rakhine state. Myanmar and Bangladesh signed an agreement on the repatriation of Rohingya refugees on November 23.
"I'm very happy, two away games and we get four points - it's not excellent but it is good", he told Match of the Day.
Swansea boss Carlos Carvalhal says that with video referee assistance, Newcastle would have been beaten today.
Benitez concedes that Joselu - who cost a reported £5 million (A$8.66 million) from Stoke City - could chip in with more goals, but says the Magpies would have to pay much higher fees to secure a better alternative.
"We want to jump up positions".
"But we have to make the substitutions and that is it". "The attitude in all the games has been fantastic - they are upset today because they wanted to win, but we will give a good answer in these two games." . This game we prepared really well to play with the ball, I think we had 57% possession but we also tried to move the ball into the spaces to create damage to the defensive organisation of Newcastle.