Log in as her on your device. Delete the history, turn off ad personalisation, unsubscribe and block dodgy stuff, like and subscribe healthier things, and this is the important part: keep coming back regularly to tell YouTube you don’t like any suggested videos that are down the qanon path/remove dodgy watched videos from her history.
Also, subscribe and interact with things she’ll like - cute pets, crafts, knitting, whatever she’s likely to watch more of. You can’t just block and report, you’ve gotta retrain the algorithm.
I think more Pixel’s a true flagship product. Big Tech corps are always launching likely contenders, then they evaluate them over time and if the benefits don’t realize or they find a better product it gets discontinued.
But some products are proven. The only way Alphabet and Apple would discontinue their flagship phones is if there’s some kind of mass turn away from mobile phones. Same as how Alphabet is not going to exit the search engine field.