Welcome to the forum.
So you are running the engine commonly found in the Golf GTi Mk 6. Some benefits and also some negatives. No fuel pump cam follower to change and also no cambelt change either.
However, the cam chain used instead can cause a problem if the tensioner fails. It’s worth seeing if this has been changed to the latest revision which is fine. Some people have this done as a precaution as having this done is cheaper than the consequences of failure. Make sure you are using the best quality oil and change it regularly to minimise tensioner problems. Have the PCV system checked as a failure can cause the crank shaft oil seal to leak!
Other than these things, all the tuning up modifications, recaps etc can be applied as to other turbo VAG cars. However, it is worth checking if the tuner of your choice can unlock the ecu on your car. Some tuners cannot do it. My son has a TT with a similar engine and unfortunately RTech could not remap it . However, he has APR software instead and is very pleased with the gains.
Enjoy your new car!