Hot plug of USB drives

What OS? Debian?
USB mounting is Linux duty, GmoccaPy can not do anything about it.
Try different USB sticks if you can, some mount quite fast, some take ages, usually depends on the speed and access time of the stick more than speed of the PC.

Another thing, if using extension cable, try to find a better quality one, makes a huge difference.
From experience, i have over 200 USB cables around here and in the shops, most are useless, but i did not know that for sure until i got a USB tester a month ago, now it's probably down to 60 or 70 cables, the rest got binned!
It hurts to think how many times those have caused me grief. The strange thing is, some cheap ones turned out quite good and some expensive ones had to go.
Cheap, but good:
Ugreen
Baseus
Anker
Avoid other cheap ones.