Hex RB750Gr3 Maximum active session limit for pppoe

hi
I am using hex RB750Gr3 level 4 license as pppoe server and for authentication I m using (chr in cloud with free license level) usermanager

In routeros licensing manual says level 4 licence user manager activate session Limite is 20

But I am using hex as a radius client

My question is how many PPPoE client can simultaneously active in my hex which I m using as a radius client

200 Based on license!