I would think installing an older OS on a portable drive that would run MW and using it to export into something useful today or at least importable into Pages or something would be a lot easier than the Parallels idea…that requires Parallels and it’s a bit harder to do than getting a Mojave installer and running it…then selecting the external disk instead of the normal boot drive that’s a newer version of macOS. Then use Startup Disk to change to the external and boot, install MW, and open/export the files.
I’m sure that many of us here would be happy to sort of email talk you through the process…although Adam might prefer it be taken off line so if you’re interested in something like that drop me your email in PM if one can do that on the website…or you can leave a comment on my travel blog at guntherandkara.com with it and I can ask questions and help you figure out if doing this is a viable thing within your comfort level.
The Parallels idea isn’t all that hard either…but it does require spending money for Parallels. VirtualBox is free to use but is also probably harder than just installing Mojave on an external drive. Me…I actually kept my bride’s 2013 or so MacBook Air when she got her new M1 for things like this…and so far it hasn’t been necessary.
Might also see if Libra Office or Neo Office or one of those other Office like packages will import MW files…I’ve no idea as I’ve never used MW and only rarely those other things. Open Office is the only one I’ve got installed since my wife gets documents in it from one of her association people and it doesn’t reference MW…so opening them in MW and exporting as something else should work nicely if you can get Mojave installed (and MW) on another drive.