Please explain ... usual device with single radio, how can it become station of two distinct APs transmitting on different channels?Yes!
That's worrysome. I asked since I wanted to connect car equipment (each such accessory as dash cam or OBD2 dongle hosts own AP for management) using LtAP mini LTE which only has one wifi card. I strongly doubt those devices allow to choose channel. Even more so that they all will use the same one.It can't if different channels