What ways are there to grow taller as a 25 year old?
At the age of 25 absolutely nil. HGH is of no effect whatever after your growth plates have closed. Even with open growth plates it can only help you if you are actually deficient in HGH. Leg lengthening surgery is very dangerous and very complex and definitely not recommended but perhaps you might nevertheless wish to investigate that option in a web search for “leg lengthening surgery”.