I guess I didn’t clarify.
I have the studs removed already.
I’m not sure about the reinstall . Do the new studs need to be re swedged?
If so is there a tool to do it ?
Your working with Disc Brakes, correct?
No, you didn't clarify.
New studs are just pressed into the hub, and the new rotor, holding them together.
No need to do anything else.
Don't make a mountain out of a mole hill. Don't loose any sleep over it. Don't worry about it.
You evidentally got the old studs out without any problems, so your not gonna have any problems pressing in the new studs.
