is it possible to sweep with some utxo'es over coin control to gain more privacy if u want to take the sweeping step ?
The private key provided by ChipMixer for any given "chip" should have exactly one UTXO associated with it... if you're trying to sweep that UTXO while also spending it with other coins that you control, you're effectively removing ALL of the benefits of having used ChipMixer in the first place, as you're linking that "chip" with all the other coins you're trying to spend...
I don't see how you think that sweeping a "chip" plus using "coin-control" is going to give you any added privacy??!?
It sounds like you're a bit confused on exactly what "sweeping" is... and what "coin control" is useful for...