This is the part that a lot of prescribers don't understand unfortunately. And can be frustrating while tapering as it seems progress is coming to a stop.
Here's a great quick video explaining what is happening: https://youtube.com/shorts/Rj_5mpRoWKc?si=ysYe994NQDD2AkgN
The Resource section here also has a course with a module breaking down what is going on with the last few mg's / end of taper.
If possible, you might want to consider extremely small cuts. That's not always reliably doable though depending on the med.