If Note Air 5C is like Palma 2 Pro (which very likely, since they came out about same time), there is need to swap activeslot to other one, reboot, and then back to original - AFTER flashing back original unpatched boot partition.
You can probably do fastboot reboot command to force reboot. And then hold volume Up and Down on reboot to get into EDL mode to do that.
Unfortunately I do not know how to do that in Windows EDL. Try to look
here where I run into issues.
About debloating. What bloatware is on Air 5C? On Palma there was in real NO bloatware except that AI thing. But I did disabled
some packages on mine, cause I find some default apps unusable. But comparing to that any phone on the market, device has no real bloatware at all.