This DKMS module allows you to overclock some USB devices by overriding their endpoints' bInterval values in the device descriptors – if the device physically allows you to poll it at higher frequency and will give you more data.
Back on Windows this (with the same method) was rather trivial using the "hidusbf" program. And ever since moving to Linux I was pretty annoyed I didn't have a similarly simple enough way of doing the same thing. So basically I guess I had no choice but to make one.
And the module allows doing that for theoretically any USB device without patching and re-compiling the kernel. Installation instructions are in the README (there's .deb, .rpm and AUR packages):
https://github.com/p0358/usb_oc-dkms
So let me know what you think, and if you managed to overclock any gamepads or other devices, or want to try.
8K poll rate is the maximum for USB 2.0 devices (or rather faster than USB 1.1 speed ones), so you cannot achieve anything higher than that, at least not with this method (I don't know if the host hardware can be even forced to poll higher, that could be an interesting project to try at some point maybe).
Did you actually benchmark that it can poll this high btw? We found an interesting thing with DualSense controllers that were frequently mentioned that they poll at 8K, but it turns out it might be only motion sensors, and the actual controller part that people would care about is only still 1K basically...
And if I understood you correctly, your mouse has web-based settings portal that allows you to set the polling rate there? If so then that module won't give you anything further, as it's meant for devices that don't expose such a setting for the user to choose, and yet they can be forced to be polled higher nonetheless (that seems more common with controllers than pro mice, but there are mouses like that out there too)