In PowerPoint, I am a happy user of IguanaTex [1].

There are also some other PlugIns like TeXsword. But I have not tested them. And newer MS Office versions seem to support Latex macros directly. [2]

[1] https://github.com/Jonathan-LeRoux/IguanaTex

[2] https://support.microsoft.com/en-us/office/linear-format-equ...