It's basic SMD rework, but the chip may be highly water absorbent so it may need baking out first if hot air is used. Some of the suppliers also use low melting point plastics which means temperature control is vital.
I've chip replaced APA102s. I use two soldering irons with wide tips so I heat all pads for the chip at the same time and lift it off when the solder is melted. I then solder it down like normal for surface mount of it's lead type. Two if the TS100 TS-K slanted blade tips works nicely for these small packages. You could also try a hot air soldering station, but that may cook the chip. Baking out likely would be needed before removing one for use that way.
There are a number of places where you can buy the chips, but I just remove one from the beginning or end of a cut off strip, and solder it in place of the dead chip. That way the characteristics are all the same.
If I was using hot air for removal, I'd likely shield the LEDs to either side with aluminum foil or some other form of heat shield.