testing broadcast on multiindex
- [x] closes #34388
- [x] tests added / passed
- [x] Ensure all linting tests pass, see [here](https://pandas.pydata.org/pandas-docs/dev/development/contributing_codebase.html#pre-commit) for how to run them

can you merge master and update to comments Yes, I was working on other stuff, will work on it now! @gabrieldi95 can you merge once again and ping on green thanks @gabrieldi95 