LHGGM&EG18-EA carrier switch

Hello everyone, I ran into problem switching carrier on my LTE modem, I’m from Ukraine and since war started, they allow carrier switch to any carrier that is available, doesn’t matter what sim card you’ve got(it can be sim of one provider and you can use frequency of another), on my iPhone I’m able to switch to any of the carriers that is available. On my Mikrotik antenna I tried both, web interface and Winbox, I place check mark - Allow roaming, then I scan LTE frequencies for available operators, I get a list of 3 operators, then I don’t know how to switch to those, I tried clicking on operator’s name and there is no option to connect to that operator, could you guys help me? Thanks in advance!

Found an answer here, after scanning, I took operator code and entered it in general tab, in operator field, maybe it will be helpful to somebody