Younger men don't have different treatment choices
It is said by some doctors that younger age of diagnosis should affect the choice of first treatment.
But looking at the results of treatment of 407,599 men with prostate cancer included in the Surveillance, Epidemiology and End Results (SEER)-database
(basically all the men with prostate cancer in the United States) showed that age did not affect treatment results.
So, I am not a doctor, but it seems to me that younger men have the same range of treatment choices as other men.
Tumour characteristics, treatments, and oncological outcomes of prostate cancer in men aged ≤50 years: a population-based study: https://www.nature.com/articles/s41391-017-0006-9
On the other hand, looking through the NCCN guidelines (expert guidelines for American doctors on prostate cancer treatment), what should be done for younger men is start treatment for any recurrence (cancer coming back later) sooner than for older men.
This recommendation still holds, as far as I can see, in the 2022 guidelines, but the 2019 guidelines are better to search for terms: