I should think that pterosaurs would need soft ground for that sort of trick. And how would they land? Their wings seem very fragile for the need to routinely have contact with the ground.
I suspect there were heavy calluses, or maybe even something like a hoof, in the soft tissues over the “elbows” where the wings contacted the ground.
The heaviest birds which can take off and land in our present world go around 25 lbs and those can barely take off or land, while some of the flying pterosaurs would weigh up to around 1000 lbs in our present world. The obvious inference from that as well as from the question of sauropods is that those creatures never experienced gravity the way we do at all and that gravity itself is not some sort of a basic force in nature or four dimensional differential geometry sort of thing as Einstein described, but rather some sort of an electrostatic effect which was reduced for whatever reason in the age during which those kinds of creatures lived. There’s no other explanation which really works.