I'm looking for a way to programatically find a special Wingdings character on a slide.
e.g. the Wingdings character with a decimal code of 254.
However since it seems to be easy to do in Word (see here: https://wordmvp.com/FAQs/MacrosVBA/FindReplaceSymbols.htm) I can't figure out a way to do it in Powerpoint.
Word provides a function that gets name and the char code of a symbol
Sub GetCharNoAndFont()
With Dialogs(wdDialogInsertSymbol)
Debug.Print "Font: " & .Font
Debug.Print "Char number " & .CharNum
End With
End Sub
Is there any equivalent in Powerpoint?

I might still misunderstand your question (I'm not sure what you mean by
search for symbols) but you could use:Powerpoint:
TextRange.InsertSymbolMethod (PowerPoint)AscWFunction (VBA)ChrWFunction (VBA)Insert ASCII or Unicode Latin-based symbols and characters (Office 2007-2016)
Excel:
WorksheetFunction.Unicode Methodto identify the code for a Unicode character.WorksheetFunction.Unichar Methodto return (display) a Unicode character.WorksheetFunction.Find Methodto find specific symbols on a worksheet.