Zero to three are critical years for child development. The brain grows to 80% of its adult size by then.
What happens doing those years has outsized effects on the child the rest of their life.
So yes, I won't be able to shield her from screens forever. But I can still do my best to set her up for success and prevent her from being a screen junkie.
You should absolutely continue to protect your kids from screens (and I think some kind of active role is a good thing), but as someone who was raised in a very restrictive household: be careful not too go too far the other way. For example, I was not allowed a mobile phone until I was 16 years old, and this was incredibly socially isolating and made it hard for me to participate in the shared social life of my peer group.
My suggestion would be to listen to your kid when they inevitably ask for access to these things, and while you should acquiesce every request, you shouldn't dismiss them out of hand either, and should take their reasoning into account.
What happens doing those years has outsized effects on the child the rest of their life.
So yes, I won't be able to shield her from screens forever. But I can still do my best to set her up for success and prevent her from being a screen junkie.