Hello.
I sell personalized jewelry, and I am looking for symbols to set an example for customers.
I found only 5-6 png symbols that I can use on my laser engraver.
There is a place where I can find a big pack with this type of symbols (I will attach some examples), either free or paid.

https://png.pngtree.com/png-vector/20190228/ourmid/pngtree-family-icon-design-template-vector-illustration-png-image_710428.jpg
https://www.pngrepo.com/png/288731/180/heart-mother.png
https://i.pinimg.com/originals/51/d4/f2/51d4f2a17a00fcc5c90d1fb2087590dc.jpg

Vecteezy (https://www.vecteezy.com/backgrounds-wallpaper/12676-simple-flower-vector-background) seems to have a good selection.

Ogazone (https://www.oogazone.com/2018/best-free-simple-palm-tree-silhouette-vector-images/) - Clipartbest (www.clipartbest.com/simple-vector-wings) - Free-Vectors (https://free-vectors.com/free-floral-vector-graphics/)

You can also convert other images into a vector png, from simple jpeg's and whatnot...

Vectorizer (https://www.vectorizer.io/)

Engraving is an intaglio printmaking process in which lines are cut into a metal plate in order to hold the ink. In engraving, the plate can be made of copper or zinc. The metal plate is first polished to remove all scratches and imperfections from the surface so that only the intentional lines will be printed