Can I replace my phones motherboard with a better one?

Commonly used now the Samsung galaxy a series is on the rise in popularity but they also have one common flaw my Samsung a30 Motherboards when bad I was told it was burnt and that issue was common with these phones and It can be replaced I was also told you can now swamp the mother board with a even higher capacity once the model is the same . I would like to know is it possible to replace my 32gb Motherboard with 64gb motherboard? And would that upgrade the phone performance and stats?