How do I add a custom shape to MacOS Freeform?

I would like to add a shape to the standard supplied shapes in MacOS Freeform, which popped up on my Mac mini after I installed Ventura. The shape is an ALU - Arithmetic Logic Unit - used in computer architecture diagrams. (It looks like a letter V drawn with a veeerrrry wiiiidddee pen. Google "ALU Symbol".)

1. Can Apple add this to the standard set of shapes provided with Freeform? I am never going to use 90% of the standard symbols. All the diagrams I draw mostly use only rectangles and lines.
2. Is there a way to add one's own custom symbols to the set supplied in Freeform?

Thanks in advance for any answers.