Rather than switching g out everyone’s hardware and operating system, or duplicating files in different formats, have you considered standardising on a cross platform word processor.
For example, Microsoft Word is perfectly serviceable on Apple devices, and th Office suite can almost alway be found on sale for under 50 USD.
This is a cheap option, with the fewest people impacted, and no risk of out of date multiple version formats resulting.
Good processes beat the convoluted application of technology.