I bought a Lenovo Flex (I think that’s what it is called) from the onset of the pandemic for my kid. It is a convertible tablet. It works perfectly except now i

I bought a Lenovo Flex (I think that’s what it is called) from the onset of the pandemic for my kid. It is a convertible tablet. It works perfectly except now it is slow. Is there any suggestion for a replacement with similar tablet but a bit beefy?