I have removed a few IC402's just hot air and tweezers.? I do use some aluminum flashing to screen off local components from the hot air.
When replacing, I think it was Hans, recommended using Blue Tac to keep the SMD's in place while soldering.?
I find that sometimes a pin is not properly soldered although looks good under the microscope.? I recommend checking continuity between the pad and pin.??
Note the replaced soldering will look uglier than the original. If you look at the PPT needed mod you will see even the QRP-labs change IC402 looks fairly ugly:
https://www.qrp-labs.com/qmx/qmxpttmod.html#galleryd20f63044e-3
I hope this helps, good luck
Chris
