Thx @plockhart, at least I have a workaround to check where my pawn is from a third-person view. F8 is the default shortcut to toggle eject/repossess pawn which is pretty convenient.
Obviously it doesn’t fix @Donut5 's case where he must control the character at the same time. I guess you need to implement a custom Camera swap function and map it to a custom input, so you can switch to third-person / fixed view during play while preserving the normal inputs.