BOE: 1000 active satellites, launched with 3 tons of fuel+oxidizer each for an expected lifetime of 15 years is 3000/15=200 tons of fuel+oxidizer needed per year.
Note: 3 tons is too much, as many satellites will have a total mass that's less than that. I could be an order of magnitude off.
Most of these will be hypergolics so no oxygen, the remainder is electric propulsion so no oxygen either. Oxygen is avoided because it's difficult to store long-term due to boiloff. In the current market, basically only the ISS would benefit from on-orbit availability of oxygen.