[csr86]

Nature has come up with moving limbs on animals, but none of the trees seem to be tracking the sun. Branches are in fixed positions.

[gpm]

There are some plants that track the sun, e.g. https://youtu.be/w-adcjH-xyk?si=Pcx4ucVe1oVwbdH4

It's definitely the exception rather than the rule though.

[AngryData]

Many trees don't but lots of smaller plants do tilt their leaves towards then sun and can be seen easily in a timelapse. And also like the other guy posted, sunflowers famously follow the sun.

[cyjackx]

Spamming leaves is probably just the cheapest strategy?