I use one of these;
https://www.amazon.co.uk/Ibera-Utility-Adjustable-Foldable-Mechanic/dp/B00G7ZO3GE/
It was pretty close size-wise on a 2.8" 27.5 wheel and I haven't tried it on a 2.6" 29er yet.
I use this on my 2020 Levo, you have to set the angle just right but it works.