Wiring concerning distribution board diagram

[DarKCroNo]

Hi,
I've been wondering about the breakouts, the power being supplied to them require low currents I believe? My question is that concerning the diagram that First has provided in the readings, It shows that the wires for the breakouts are all diverging from a single wago connector; is this I guess a solution to providing protection to the breakouts since the breakouts require 5A breakers? In other words instead of connecting the breakouts to individual wagos and providing a 5A breaker to each they connected all the breakouts to one wago and attached a 20A breaker? and also would this make sense? I don't know much about electricity and so I'm wondering that the total current required for all 3 connections if it were to exceed 20A than it would disconnect the wiring, in other words providing (20/3)A protection for each individual wire
thanks hope it makes sense
Oh and another thing is we have followed the diagram and so we are wiring it as such and it works. The only concern is if this is allowed and if it does provide the protection needed.