A google search of form “fritzing part Pixhawk PX4 PIX 2.4 32 Bit Flight Controller” turns up this post from 2019. I doubt much has changed since then.
Similar google searches will turn up any parts that are available (some of them are in core parts in Fritzing as well so search in the parts search window.) Therr is a generic servo motor in core parts for instance and at least one DG servo that I remember.
Peter