If you mean from the Col de Tentes - Port de Boucharo - Bujaruelo... The first part Gavarnie to Col de Tentes, lovely tarmac (very steep). Then from Col de Tentes up to Spanish border Port de Boucharo) is a nice wide track. From Port de Boucharo down into Spain it's a path down into the valley.
We were there in 2008/9 and the last bit before the border (from the French side to the border and back) had many stones laying on the breaking up tarmac. There were landslides that had taken out the road and you had to navigate over and around. The last bit was impossible to ride so we had to push. Looking at google images, I see other people have taken their bikes over on their backs.
Here's some pictures, sadly I didn't get a stamp in my passport, but I flew my kite
But if Komoot says it's a route, it's really depends on how much "adventure" you want to add to your tour. Looking at the pictures from back then and the photos on google, we have toured/pushed/dragged on stuff like that in the past.