Access Control and Parental Control

Hello, I'm wondering if at, if I can block new devices from connecting to my network while also using parental controls. This is mostly because I don't want said devices that are controlled with parental controls to spoof their MAC address to circumvent what I setup (an example is a Xbox Series X can change their shown MAC right in network settings). I know I can get access control back if I disable Parental Control then factory reset router, but I want the features of both of them.

If there is a way to with Parental Controls to block new devices automatically I do not know of it, but that would work for me. But I just find it odd as to why in the first place why Parental Control disables Access Control unless it replaces all of its features.

Any help with this would be appreciated.