Very strange. He doesn't appear to be called up on their website for either squad. A Romanian guy on Twitter who tweets about football in Romania in English posted the U21 squad and he doesn't appear to be there either.
To further this on, I asked him about it and he said
1301557900368846848
Not in the national squad or the U21's.
National team: https://www.frf.ro/nationale/masculin/echipa-nationala/23-de-tricolori-convocati-de-mirel-radoi-pentru-meciurile-din-septembrie-in-liga-natiunilor/
U21 squad, at the bottom of the page: https://www.frf.ro/recomandate/rou_fin_mlt/