Hi Christiana and welcome to the forum.
There have been a lot of request for the bottom module lately, so it’s as bit of a search.
What do you think is wrong with the module? If it’s charging issues check the usb port and cable for dirt that may cause resistance.
Another issue is that the soldered joints of the usb to the module may be damaged, so if you like you attempt or ask someone else to effect a repair if that is the issue.
a link to help repair if the problem is joint fatigue.
@JohnHughes (thanks again) send me two broken bottom Modules some days ago. This one has a defekt µUSB port.
After disassembling I took a picture with a microscope camera and found some solder cracks. Barely to see without magnification. Two cracks at the shield contacts that I am not too worry about, but also one at contact 5. I am sure that was a slack joint. Some serious force must be acted to the Port.
I will try to resolder the joints and hope the bottom module will be able to do its work…
Debris issues, although this post is for an FP3
It could be debris in the usb port. If you manage to clean it and it works consider using a case when in your pocket etc.