The other web site you can look for a touring partner is :
https://www.crazyguyonabike.com/clas...&sub_locales=1
It's also a good site with allot of touring diaries/blogs. Navigation on the web site is not intuitive but LOTS of info to be found
Good luck finding a good partner to do the tour with.
You probably know but check out the Eurovelo Routes
https://en.eurovelo.com/ev11 and
https://en.eurovelo.com/ev13