Everything you need is here,

https://github.com/alsyundawy/Microsoft-Office-For-MacOS

Just download the latest version with its volume serializer and you are good to go.

It’s useful for their portafolio

You can side load it with AltStore or SideStore, it’s pretty straightforward

I prefer using yattee, but lately most instances throw an error and has been unusable for me, hopefully it can work more consistently over time

Or sideload uYou/uYou+, works really well!