Unless you’re buying some sort of end-to-end managed WAN service, there is nothing for the satellite provider to “fix”. It’s the customer’s responsibility.

The spacecraft carries a bunch of linear transponders. RF goes in on one frequency, and comes out on another frequency.

The satellite operator leases you space on a transponder with a specified frequency, bandwidth and power limit, that they monitor very closely for compliance to ensure that you aren’t getting more than you paid for and that you aren’t causing interference.

Everything else about the signal from layer 1 upwards, ie the modulation, symbol rate, FEC etc is largely for the customer to choose, though some operators like Intelsat used to be a bit more prescriptive in this respect. None are looking at your protocol stack from L2 upwards.