I understand what you’re saying, but when I did the usual “What does the internet say about this?”, search interpreted it to mean “How can I draw mathematical diagrams online?” rather than “How can I draw mathematical diagrams to post online?”
For example, draw math diagrams, etc. online free with Mathcha https://www.mathcha.io/
I am interested in the results, as I have supported (and barely used) the eqn/grap/pic/troff package and LaTeX.