I respect the heck out of Sarah Palin, but I do not believe she would be a wise choice for Trump. She needs to remake her public image to undo some of the damage allowed (and promulgated, in some cases) by her handlers in the 2008 campaign. McCain’s people and the left (media and democrats alike) were allowed to define her in ways that should be grounds for political firing squads.
I would also like to note that GOP women who are pushing identity politics are idiots. If you have a specific person in mind, then promote that person as a potential running mate - don’t make having female body parts the crux of “qualification”.