Donald Trump made his highly anticipated debut on the “The Joe Rogan Experience” Friday night … and it sure seemed like 45 was not leaving without a public endorsement — that very moment!

DT sat for a nearly 3-hour interview with Joe Rogan … their conversation touched on several topics … but one moment that really stood out was Trump requesting — practically demanding — Joe’s seal of approval for re-election.

Trump flaunted his “nicest endorsement” from Elon Musk … before he told Rogan … “You should do the same thing, Joe.”

A relentless 45 told JR there was no way he could be a Kamala Harris supporter … at one point joking … “You’re a Khabib [Nurmagomedov] person, but you’re not a Kamala person” … which got a legit laugh out of Joe, with KN being a UFC superstar.

Despite the pestering … Rogan never agreed he’d endorse Trump — at least at the moment — and he, obviously, didn’t deny he would later.

Of course … the two are not strangers … Trump and Joe run into one another when DT goes to UFC fights … which he’s done several times over the years.