That Celeron ain't got nothing on any phone processor Apple's made in at least the last half decade lol
I'm not sure the Macbook Neo will make sense, but I know for sure that docked tablet doesn't. They're also ass to repair, performance doesn't exist and the screen belongs in 2008.
And RAM is meaningless without a processor to use it. So I'm saying this MacBook Neo is probably kinda shit for its price, but the Stream is for sure not any good.
For the price of the MacBook Neo, the best device to get would actually be a used laptop. Either an Apple Silicon Macbook Air if you can find one with 16 GB, or some kind of a Thinkpad if you want to have more freedom.
Cheap laptops tend to suck, but used laptops in the same price range can be very good.