Unfortunately, the Maya Bonus Tools is not available yet for the latest Maya.
But there is a simple way to make the previous version work with Maya 2023.
If you don’t already have it, you can download (and then install) Bonus Tools 2018-2022 from here: https://apps.autodesk.com/en/Detail/Index?id=8115150172702393827&os=Win64&appLang=en

1. Open the PackeageContetnts.xml file in a text editor (C:\ProgramData\Autodesk\ApplicationPlugins\MayaBonusTools-2018-2022\PackageContents.xml).
2. Replace all SeriesMax=”2022″ part with SeriesMax=”2023″
3. Start Maya 2023 and create a simple python script to append the python path with the original, Bonus Tools python-2022 folder:

import sys 
sys.path.append( 'C:/ProgramData/Autodesk/ApplicationPlugins/MayaBonusTools-2018-2022/Contents/python-2022' )

That’s it.

Cheers, D