I have a 3 section ladder too myself that is 4.25 m when closed and
10.63 m when fully extended.

Now you are supposed to have a minimum of 4 rungs of overlap between
each section, so far so good....

But when my hieght is 1.83 and with extended arms adding another 0.8m
giving a maximum reach from the ground to push each section of ladder up
by 2.3 m.

So if one extends each section when resting up against the wall, thats a
max of 4.25 m + 2.3 m + 2.3 m = 8.85 m.... which is almost 2 m of 10.63
m fully extended.

The only way I can see of reaching that full 10.63 m is to lay the
ladder on the ground and then extend it and then upend the fully
extended ladder which is actualyl quite dangerous to do on your own.

Some ladders do have a pulley system but they do not seem all that common?