Toilet Training Twins. When the student is ready, the teacher will appear.

I recently went through my diary of back when I was potty or toilet training my twins. The quote, “When the student is ready, the teacher will appear.” would play on my mind.
My girls were 2.5 years when I actively took up the parenting challenge of toilet training them together. At the time in pursuit for finding a solution I purchased:
Now I just accept that sometimes it doesn’t matter what I do (except install one of those fantastic tiny toilets from kindy) that if the child is not ready, sometimes you just got to wait a little longer to support them.
Do you have any tips on toilet training twins?