Wiping the drive and no Time Machine backup may have been your undoing.
You can try the following, but no promises it will work now:
If you (not Apple, not a reseller) installed Pages or Numbers from the Mac App Store since Oct 2013 you may be able to get the last compatible versions (11.1) of these applications for Catalina. Launch the Mac App Store and sign in with the same Apple ID that you used to previously install these applications. Press cmd+0 (zero) to open the Purchased panel. If Pages and Numbers appear there, click to download them. Do not click Cancel on any dialog that may appear and the last one will ask if you want to install the last compatible version of these applications for Catalina. Agree.
If the third paragraph above does not get you these applications, then you are on to BDAqua's suggestions, or you could squeak by using Pages or Numbers for iCloud.
The current (as of this post) LibreOffice 24.2.3 is supported on Catalina. Its documentation is here — all of which were written in LibreOffice. Surprisingly, LibreOffice Writer will open (read-only) current and simple Pages documents.