That's close to the right question. I'd suggest "are there about to be any other capable providers in the same ballpark?" In which case, probably, in Ariane 6.

Outside of the US and EU governments this has not been a large market. The fact that another launch client is entering the space should suggest what the overall trajectory here is going to be.

Finally, with a lifetime of 5 to 10 years for each launched satellite, and SpaceX not being required for operation of the satellites, I'd suggest they're not nearly as dependent on a "competitor" as the OP implies.

Not yet, but there will/should be in the near future. And that’s how most businesses work. Have to make some assumptions and calculated risk.