The dipstick can be kind of hard to reach.
It is just under the lower radiator hose.
It will have a yellow handle.
Use a flashlight and look from different angles.
It can be hard to see if you are not familiar with it.
Make sure the first time you find it the engine
The radiator hose gets very hot.
When you are actually checking the level make sure the transmission is at normal operating temp.
This would be after a nice drive on the highway.
Have the engine running, shifter in park.
Park on level ground.
Pull out the dip stick.
Wipe it off. Install it. Pull it back out.
This will give you an accurate reading.
The fluid should be between the min and max hot lines.
This will give you an idea where to look.
This picture is an xc90 so the intake lines are different.
But it shows the location better.
Let me know if you need more help.