Thunderbolt 4 speeds on iPad Pro limited to 10gbps on Mac

I am trying to transfer individual large files between my iPad Pro (12.9 6th Generation) and MacBook Pro (M3 Pro). However, the speeds are nothing like what I expect them to be.

Am I missing something? Is there a 'proper' way to do this?

Both devices are advertised as USB / Thunderbolt 4 speeds on their port. I am using a certified thunderbolt 4 cable from Sabrent.

The big red flag here is that the iPad isn't recognised under the thunderbolt 4 bus (it is using a different port to my dock):

However, the iPad shows under ethernet devices with a maximum speed of 10Gbps (though the transfer is even slower than that):

If this is design intent, I think it's ludicrous to advertise both of these 'Pro' devices as being Thunderbolt 4 capable but intentionally handicapping the data transfer between the two main 'Pro' products.

Any help would be appreciated.