Obviously, it's down to personal taste and how you plan to use the map.
One option that may work is to use
CycleTravel.
Import the gpx files into a folder.
Display the folder as a map and all the daily rides will be displayed in different colours.
Like this: (Using Spanish IGN map)
View attachment 710037
However, a few provisos:
There is the possibility that CT will "adjust" your gpx file on importation. (I believe most planners do this if the recorded route does not match their map).
I think you may need to be a subscriber to go beyond a certain number of files in a folder and you certainly need to be a subscriber to have the full map choice. It's very cheap and an excellent cause.
The image can be screengrabbed - which probably limits its application.
As you can see, the IGN doesn't work particularly well in this case. Other options are available:
View attachment 710038
From space!
View attachment 710039
I've never done it, but I imagine "stitching" the individual gpx files into one would be the way to go, then looking for a map printer.
In any case, this "display" a folder option is fantastic for planning as we can see the route grow and grow, see what we're hitting and also what we're missing.
Edited to add:
It is possible to recreate each day's gpx accurately on CT by displaying a "trace" of the route and plotting a copy. (Could be done for the "stitched together" version also. Then the route is 100% in accordance with the Komoot recording.