superscripts doesn't display in bookmark

[Please don't make multiple posts on the same topic]

This is an Acrobat limitation, as bookmarks use plain text only. You could use an OTF Pro level font that contains Unicode superscripts, but not all PDF viewers may be able to interpret this properly.

I made a superscripts with equation from FM in my  title of datasheet   as "I2"which "I" is the big number and "2" is the smaller on the top right corner of I .

In bookmark doesn't display it.