Get a 5 gallon bucket with lid. Put garbage bag inside. Put toilet seat from broken toilet on it.
Use it, remove refuse if needed, put lid on.
https://www.kildwick.com/en/fancyloo-divert
I love the design of it though, I'd never even though about diverting flow toilets, but this design is so simple and elegant.
Get a 5 gallon bucket with lid. Put garbage bag inside. Put toilet seat from broken toilet on it.
Use it, remove refuse if needed, put lid on.