What’s the catch?

Vučić’s second and last mandate expires in mid-2027.

Maybe he is trying to get into the world Guiness book for first fascist to leave politics early without having a plan to not really leave. You never know, somebody has to be the first.

I just checked r/serbia. People are saying he’s probably lying (he already said he’d resign and then didn’t) or that he’d just do the Putin-Medvedev sort of switch to PM position. Overall, total indifference from the population.