Yes but

Another detainee reportedly told another embassy that they had seen her [Thunberg] being forced to hold flags while pictures were taken

is not the same as

They dragged little Greta [Thunberg] by her hair before our eyes, beat her, and forced her to kiss the Israeli flag. They did everything imaginable to her, as a warning to others

I don’t doubt she has been forced to pose with a flag and thus ask wether those pictures has been released.