I used the summer infant my size potty from 12 months with a child led method. Its annoying how many parts it has for cleaning reasons and my curious child is obsessed with taking it apart which is a huge negative for me, but I liked how it looked like the real toilet, was the right size for a small child, and had a good splash guard for my boy.
We used the baby bjorn potty (the one with the taller back) it worked quite well
I used this one. Its cheap and very simple. Bit smaller than others and not overly sturdy so it's only really meant for when they're little. I've been using it with my 10mo old for a couple months now. First Steps Plastic Potty for Baby & Toddler for Potty Training, Assorted Color https://amzn.eu/d/5aa2Jz3