Yep. BGA SSD and RAM chips can often be changed, sometimes offering more capacity than was officially available.
One can also DIY such mods/repairs but it requires some extra equipment and supplies.
One can also DIY such mods/repairs but it requires some extra equipment and supplies.
Searching for "bga soldered ram chip change laptop" on YouTube returns like thousands of results of people doing this.
Although I now realize how skewed my perception of microsoldering and other such skills because such skills seem to be extremely niche in the west.