I have read it is technically true, but reliable news places won’t call them President because it’s also technically not current. In the US, apparently once someone is president, they forever have the president title.
That douche from the “ change my mind “ meme, I checked out one of his YouTube videos a while back and he called the US President Biden “former vice president Joe Biden” after he was already president. Which is so douchey, it’s kinda funny.
(He deleted all of the YouTube videos since then to force people to watch him on his grifter platform. I’m shocked. At least it’s only shitbags being grifted.)