Impedance parameters of separate capacitors and parallel capacitors. Although the impedance of the parallel capacitor at a given frequency point is lower than that of a single capacitor, the parallel connection still has the same resonance frequency.
However, as the frequency moves away from the resonance point, we can see that the impedance curve is V-shaped and that its impedance still increases quickly. It takes a sizable capacitor with the same value connected in parallel to achieve the goal impedance requirements over a broad frequency range. This approach is ineffective and wasteful. On the circuit board, some people like to scatter several 0.1uF capacitors.