When we mean specs..... we mean power supply details...... voltage rating and current rating, power rating etc.
You previously wrote..... "2) Receiver "NRF24L01" with 1 servo and H-bridge L298n + DC motor all connected to arduino nano (power supply 9v) which works very well with 9v".
It's important that your details stay consistent. If for some reason that you change your details..... then that needs to be indicated. Otherwise, people need to try to figure out what the actual problem is. And they might not be able to figure it out - due to inconsistent details.