Office for iOS (iPhone / iPad ) is getting the Icons or SVG support already available in Word 365 for Windows.
Icons now available to Office iOS Insiders on the Insert tab. There are 500 to choose from …
Source: Microsoft
Available in the Word, Excel and PowerPoint apps for Android.
Icons are really SVG graphics which can be easily scaled to large sizes, colored, rotated or transformed.
See our article on SVG graphics in Word