You might be confusing “Dyson sphere” with the Dyson shells from science fiction, which is more specific type of Dyson sphere. You don’t need “scrith” or “neutronium” to make a Dyson sphere out of satellites (a Dyson swarm) which is the more realistic type that Dyson originally proposed, or out of statites (a Dyson bubble).
You might be confusing “Dyson sphere” with the Dyson shells from science fiction, which is more specific type of Dyson sphere. You don’t need “scrith” or “neutronium” to make a Dyson sphere out of satellites (a Dyson swarm) which is the more realistic type that Dyson originally proposed, or out of statites (a Dyson bubble).